 Patent Application Title |
Patent App Num. |
Date |
 Application execution system and method of terminal | 20130124871 | 20130516 |
 An application execution system and a method for executing applications, at a terminal, with security check on the application package are provided. The system includes an application creator including an enabler, for creating an application package including a plurality of binary codes and content files, and for adding a checksum file generated by ciphering, at the enabler, information on a main binary of the application package, and a terminal storing the application, for determining a validity of the application package, and for executing an application according to the validity of the application package, and a subsystem including a checker, for ciphering the main binary of the application package using the checker added to the open function in response to the call, for notifying, when the result... |
| System and method for enforcing security policies in a virtual environment | 20130117823 | 20130509 |
 A method in one example implementation includes intercepting a request associated with an execution of an object (e.g., a kernel module or a binary) in a computer configured to operate in a virtual machine environment. The request is associated with a privileged domain of the computer that operates logically below one or more operating systems. The method also includes verifying an authorization of the object by computing a checksum for the object and comparing the checksum to a plurality of stored checksums in a memory element. The execution of the object is denied if it is not authorized. In other embodiments, the method can include evaluating a plurality of entries within the memory element of the computer, wherein the entries include authorized binaries and kernel modules.... |
| Methods, apparatuses, and computer-readable media for computing checksums for effective caching in continuous distributed builds | 20130111440 | 20130502 |
 Methods, systems, and computer-readable media for determining whether dependencies of configuration files have changed such that the compilation strategy should be recomputed. Local build checksums are computed for individual configuration files. The local build checksums are computed by sorting input paths to the configuration files plus data indicating whether the path refers to a file or a directory and a checksum computed on the configuration file itself. The transitive closure of local build checksums are then used to compute a global build checksum: the local build checksums are sorted in order to compute the global build checksum. If the global build checksum is different from a previously computed global build checksum, then the compilation strategy should be recomputed, since this is a signal that the compilation... |
| Detection of undesired computer files in archives | 20130104235 | 20130425 |
 Systems and methods for content filtering are provided. According to one embodiment, a type and structure of an archive file are determined. The archive file includes identification bytes that identify the type of archive file and header information both in unencrypted and uncompressed form and a file data portion containing contents of files in encrypted form, compressed form or both. The determination is based solely on the identification bytes and/or the header information. Based thereon, descriptive information, describing characteristics of the files, is extracted from the header information for each file. The descriptive information includes a checksum of the file in uncompressed form, a size of the file in uncompressed form and/or a size of the file in compressed form. A file is identified as being... |
| Communication applications | 20130093597 | 20130418 |
 In some embodiments, an apparatus and a system, as well as a method and an article, may operate to transmit and receive data. Transmission may comprise transforming larger values of acquired data into smaller values of transformed data using a transform defined by a seed value selected to reduce digital pulse position modulation transmission time for the acquired data. Additional activities include digital pulse position modulating the transformed data and a checksum associated with the transformed data to provide a propagation signal, and transmitting the propagation signal into drilling fluid or a geological formation. Reception may comprise receiving the propagation signal, demodulating the propagation signal to extract the transformed data and the checksum, and transforming the transformed data into an estimate of the acquired data, using... |
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| Apparatus and method for producing a bit sequence | 20130094648 | 20130418 |
| A method for reconstructing a physically unclonable function (PUF) A for use in an electronic appliance is provided. The method includes producing a checksum C, producing a defective PUF B and reconstructing the PUF A from the defective PUF B using an error correction algorithm. The algorithm produces a plurality of ambiguous results (A1, A2, . . . , An) for the PUF A in a fraction of the cases and a single result, which may be incorrect, in all other cases. The method also includes determining by means of the checksum C which of the plurality of ambiguous results (A1, A2, . . . , An) is the correct PUF A or of whether a single result corresponds to the correct PUF A.
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| Managing inventory data for components of a server system | 20130097314 | 20130418 |
| Techniques are disclosed for managing inventory data for components of a server system. In one embodiment, a global management controller is provided, that is operatively connected to a plurality of local management controllers. Each local management controller is configured to manage a subset of the components of the server system. Each local management controller is also configured to generate, for each component, a checksum based on vital product data (VPD) of the component. Each local management controller is also configured to compute a composite checksum based on the checksums generated for the components in the subset. The global management controller is configured to maintain a global view of the VPD in the computer system, based on the checksums and/or composite checksums.
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| Identifying users through a proxy | 20130091305 | 20130411 |
| Methods, systems, and computer-readable media with executable instructions stored thereon for identifying a user that accesses a webpage from a user device through a proxy are provided. Identifying users through a proxy can include providing rewritten content of the webpage accessed by the user to the user device, the rewritten content including a reference to a data file, and the reference including a checksum computed from actual content of the webpage. The user can be associated with the actual content of the webpage in response to receiving a file request for the data file from the user device.
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| Increasing data security in enterprise applications by using formatting, checksums, and encryption to detect tampering of a data buffer | 20130086392 | 20130404 |
| A method, system, and computer program product for using hidden buffer formatting and passing obfuscated encryption key values to detect tampering with and/or prevent unauthorized inspection of a data buffer. The method comprises receiving an unencrypted sequence to be encrypted, selecting a layout version to associate to an encryption method and a checksum method, then encrypting the unencrypted sequence using the encryption method to form an encrypted sequence, and calculating, using the checksum calculation method, an unencrypted sequence checksum. Further, storing the encrypted sequence to form a hidden buffer payload, which hidden buffer has its own hidden buffer payload checksum. Encryption keys are not stored in program data, nor sent in the hidden buffers. Instead obfuscated encryption key values are used to generate keys on the... |
| Increasing data security in enterprise applications by obfuscating encryption keys | 20130086393 | 20130404 |
| A method, system, and computer program product for using hidden buffer formatting and passing obfuscated encryption key values to detect tampering with and/or prevent unauthorized inspection of a data buffer. The method comprises receiving an unencrypted sequence to be encrypted, selecting a layout version to associate to an encryption method and a checksum method, then encrypting the unencrypted sequence using the encryption method to form an encrypted sequence, and calculating, using the checksum calculation method, an unencrypted sequence checksum. Further, storing the encrypted sequence to form a hidden buffer payload, which hidden buffer has its own hidden buffer payload checksum. Encryption keys are not stored in program data, nor sent in the hidden buffers. Instead obfuscated encryption key values are used to generate keys on the... |
| Method and apparatus for facilitating efficient authenticated encryption | 20130077780 | 20130328 |
| In some embodiments, a key shared between communicating parties is mapped to a key variant using a block cipher. The key variant is mapped into a sequence of basis offsets using shifts and conditional xors. A nonce-dependent base offset is formed, and a sequence of offsets is constructed by starting with the base offset and then xoring, for each offset, an appropriate basis offset. Each message block is combined with a corresponding offset, enciphered, and then combined again with the offset, yielding a ciphertext block. The message fragment is xored with a computed pad to give a ciphertext fragment. A checksum is formed using the message blocks, the message fragment, and the pad, and is then combined with an offset and enciphered to yield a tag.... |
| Software detection | 20130080511 | 20130328 |
| A method, system and computer program product for software discovery in a computer system comprising a server and a client. Data defining at least one file category is received at the client from the server. File information pertaining to files belonging to the respective file category is established at the client for each of the at least one file category. The file information for each of the at least one file category is communicated from the client to the server. For each of the at least one file category, a checksum is calculated from the file information.
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| Mechanism for saving a snapshot of free space of a file system on persistent storage | 20130073813 | 20130321 |
| A mechanism for saving a snapshot of free space of a file system on persistent storage is disclosed. A method of the invention includes determining whether generation numbers stored in each of a free space cache inode of an on-disk free space cache of a block group, a free space cache item, and a free space cache header are valid, determining whether a checksum generated for a first page of the free space cache matches a checksum stored in the file system and associated with the free space cache, and adding entries stored in the on-disk free space cache to an in-memory free space cache for the block group kept in volatile memory of a computing device, wherein the on-disk free space cache is stored in... |
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| Data verification using checksum sidefile | 20130060741 | 20130307 |
| For facilitating data verification using a checksum in conjunction with a sidefile by a processor device in a computing environment, first block signatures having a first size are calculated for first blocks of a first volume stored on a storage device. The first block signatures are stored to a sidefile. Second block signatures having a second size different from the first size are calculated for second blocks of a second volume stored on the storage device. The second block signatures are stored to the sidefile.
... |
| Data verification using checksum sidefile | 20130061110 | 20130307 |
| For facilitating data verification using a checksum in conjunction with a sidefile by a processor device in a computing environment, first block signatures having a first size are calculated for first blocks of a first volume stored on a storage device. The first block signatures are stored to a sidefile. Second block signatures having a second size different from the first size are calculated for second blocks of a second volume stored on the storage device. The second block signatures are stored to the sidefile.
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| Protection for unauthorized firmware and software upgrades to consumer electronic devices | 20130047143 | 20130221 |
| A firmware or software update, patch, or upgrade image is authenticated by forcing its checksum to match a pre-determined value. The pre-determined value is known by a consumer electronic device in advance of propagating the image for installation. Upon propagation, the device determines a checksum value of the received imaged, and compares the checksum value to the pre-determined expected authenticity value. If they match, the image is installed. In an optional feature, the image is executed by the device and modifies the pre-determined checksum value to a next value, which is also shared or known by the image server. In this variation, no two images have the same expected value, and unauthorized images may be rejected for installation.
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| Protection for unauthorized firmware and software upgrades to consumer electronic devices | 20130047144 | 20130221 |
| A firmware or software update, patch, or upgrade image is authenticated by forcing its checksum to match a pre-determined value. The pre-determined value is known by a consumer electronic device in advance of propagating the image for installation. Upon propagation, the device determines a checksum value of the received imaged, and compares the checksum value to the pre-determined expected authenticity value. If they match, the image is installed. In an optional feature, the image is executed by the device and modifies the pre-determined checksum value to a next value, which is also shared or known by the image server. In this variation, no two images have the same expected value, and unauthorized images may be rejected for installation.
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| Chained checksum error correction mechanism to improve tcp performance over network with wireless links | 20130042162 | 20130214 |
| Data communication, with improved error detection, of a signal having a plurality of data blocks, by: error checking a received data block in a first sequence using a first polynomial, beginning with a first predetermined initial error checking state, producing a first CSUM; error checking the received data block in a second sequence using a second polynomial, using the first CSUM as a second predetermined initial error checking state, producing a second CSUM; comparing the second CSUM to the first predetermined initial error checking state to detect errors in the data communication; and repeating the above steps for sequential data blocks of the data communication, wherein the first polynomial is an inverse of the second polynomial.
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| Checksum calculation, prediction and validation | 20130042168 | 20130214 |
| A calculation, prediction and validation method can include receiving a portion of a data packet in a data buffer, computing, in a processor, information related to the checksum of the data packet based on the portion of the data packet and processing the data packet in the processor.
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| Checksum using sums of permutation sub-matrices | 20130031440 | 20130131 |
| A method for encoding data bits includes computing checksum parity bits based on the data bits. A set of equations satisfied by the data bits and the checksum parity bits corresponds to a dense parity-check matrix. The dense parity-check matrix comprises sums of permutation sub-matrices.
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| Game controller system | 20130017887 | 20130117 |
| A game controller comprising: a game controller housing; at least one user input device located on the game controller housing; a build digital data packet routine located in the game controller housing and in signal communication with the at least one user input devices; an add checksum routine located in the game controller housing and in signal communication with the build digital data packet routine; a convert to audio waveform routine located in the game controller housing and in signal communication with the add checksum routine; a headphone male connector attached to or on the game controller housing and in signal communication with the convert to audio waveform routine; where the headphone male connector is configurable to be in signal communication with an app on a... |
| Managing inventory data for components of a server system | 20130013759 | 20130110 |
| Techniques are disclosed for managing inventory data for components of a server system. In one embodiment, a global management controller is provided, that is operatively connected to a plurality of local management controllers. Each local management controller is configured to manage a subset of the components of the server system. Each local management controller is also configured to generate, for each component, a checksum based on vital product data (VPD) of the component. Each local management controller is also configured to compute a composite checksum based on the checksums generated for the components in the subset. The global management controller is configured to maintain a global view of the VPD in the computer system, based on the checksums and/or composite checksums.
... |
| Apparatus, system and method for detecting a loss of key stream synchronization in a communication system | 20120328102 | 20121227 |
| An apparatus, system and method provides an out-of-synchronization detection by using a network layer checksum. A process operating at an upper layer verifies that a checksum embedded in a network layer header is correct before encrypting and transmitting a data packet containing the header and a payload. The data packet is received through a wireless communication channel at a receiver and decrypted. A calculated checksum is calculated on the received payload at the receiver and compared to the received checksum embedded in the header. A key stream used at the receiver for decrypting the received encrypted data packets is determined to be out of synchronization with a key stream used at the transmitter to encrypt the data packets if the calculated checksum is not equal to... |
| Method and apparatus for identifying and characterizing errant electronic files | 20120331572 | 20121227 |
| A computer system includes a server having a memory connected thereto. The server is adapted to be connected to a network to permit remote storage and retrieval of data files from the memory. A file identification application is operative with the server to identify errant files stored in the memory. The file identification application provides the functions of: (1) selecting a file stored in said memory; (2) generating a unique checksum corresponding to the stored fire; (3) comparing said unique checksum to each of a plurality of previously generated checksums, wherein the plurality of previously generated checksums correspond to known errant files; and (4) marking the file for deletion from the memory if the unique checksum matches one of the plurality of previously generated checksums.
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| Systems and methods of data replication of a file system | 20120317079 | 20121213 |
| The invention relates to methods for replicating a primary file system on a primary host to a secondary file system on a secondary host including determining a primary data block to replicate by reading a space map block entry (b, e) of the primary data block, wherein b represents the first snapshot and e the last snapshot to use the primary data block; computing a checksum of a primary data block and sending its number to the secondary host and determining a secondary data block that corresponds and computing its checksum then comparing the primary and secondary data block checksums and replicating the primary data block on the secondary file system when the primary and secondary checksums mismatch for the primary file system. In another aspect... |
| Database table comparison | 20120317134 | 20121213 |
| Techniques are disclosed for comparing database tables. In one embodiment, the database tables are partitioned. Queries are generated for retrieving each partition. For each generated query, a stored procedure is invoked, using the respective generated query as an input parameter to the stored procedure. The stored procedure is configured to generate a checksum based on the partition retrieved from executing the respective query. The application compares the generated checksums to determine if the partitions and/or tables are consistent.
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| Speed-optimized computation of cyclic redundancy check codes | 20120311411 | 20121206 |
| Apparatus and methods for generating checksums may process two or more segments of a message in parallel, and may be used with a communications channel having time slots. An apparatus may include a cumulative checksum generator to generate a cumulative checksum for a message, a partial checksum generator to generate one or more partial checksums from one or more respective message segments, and a speculative checksum generator to generate a speculative checksum for each of one or more time slots. In one aspect, a partial checksum corresponding with an initial segment of the message may be generated from at least an initialization vector. A speculative checksum selector may select a first speculative checksum for use in determining whether the message was transmitted without error. The generating... |
| Geo-verification and repair | 20120303593 | 20121129 |
| Presented herein are methods of continuously verifying data and repairing errors introduced during replication. In a particular embodiment, a primary data store sends out information sufficient to create a checkpoint together with a checksum for the data being verified at that checkpoint. At the secondary data store, a checkpoint is created in accordance with the checkpointing information, and a checksum is calculated over the indicated data at the created checkpoint. If the calculated checksum disagrees with the received checksum, additional checksums are calculated over subranges of the indicated data and compared with corresponding checksums over the data at the primary data store. The checksums at the primary data store may be requested from the primary data store or calculated locally based on the received overall checksum.... |
| Dual hard disk drive system and method for dropped write detection and recovery | 20120304025 | 20121129 |
| A system is provided. The system detects a dropped write from a hard disk drive (HDD). The system includes two or more HDDs, each being configured to define a data block spread across the two or more HDDs. The data block is configured to regenerate a checksum across the full data block during a read operation to detect the dropped write.
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| Checksum calculation, prediction and validation | 20120304040 | 20121129 |
| A checksum calculation, prediction and validation system includes a host system, a network interface, a reception pipeline disposed between the host system and network interface and configured to calculate an expected full checksum related to packets received in the host system and a transmission pipeline disposed between the host system and network interface and configured calculate factors related to packets for transmission on the network interface.
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| Flexible hardware checksum generator | 20110007754 | 20110113 |
| A traffic generator may include a scheduler to provide packet forming data defining a packet; a background engine to retrieve a packet template, the packet template including a first checksum mask, a first pre-sum, and a first address; a fill engine to generate content for variable-content fields of the packet for a payload portion of the packet in accordance with the packet forming data and the packet template; and a checksum engine. The checksum engine may include an accumulator that calculates a payload checksum for the payload portion of the packet and first logic circuits that compute a first checksum based on the first pre-sum, the first mask, and at least some of the payload checksum and the variable-content fields. Insertion logic may insert the first... |
| Automated installation of operating systems on virtual machines using checksums of screenshots | 20110004872 | 20110106 |
| A method and a system automatically install a guest operating system on a virtual machine run by a host. In one embodiment, the host includes an installation manager that computes a checksum of a region of an input request image. The installation manager compares the checksum with a stored checksum, and, based on a comparison result of the checksum, automatically determines an input to the input request.
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| System and method of tracking error data within a storage device | 20100332949 | 20101230 |
| Systems and methods of tracking error data are disclosed. A method includes receiving a first checksum associated with error locations of a first error correction code operation and receiving a second checksum associated with error locations of a second error correction code operation. The first checksum is compared to the second checksum and an action is initiated on a region of a memory array based on a result of the comparison.
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| Detecting and recovering from silent data errors in application cloning systems | 20100325500 | 20101223 |
| A method, system, and article for resolving a silent error is disclosed. A primary program copy runs on a primary host, and a secondary program copy runs on a secondary host. The primary and secondary copies communicate to maintain synchronized execution. A third copy of the data is stored on a storage device as a write operations log and maintained in memory on the primary host while the program is running. The primary copy is synchronized with the secondary copy by computing a first checksum of data on the primary host in response to a read operation local to the primary host, computing a second checksum of data on the secondary host in response to a read operation local to the secondary host, and periodically communicating... |
| Method for installing patch file | 20100318983 | 20101216 |
| A computer-implemented method for installing patch files to a local storage of an embedded electronic device includes the following steps. A file header is read and an original checksum value is received from the file header. Patch files from a data package are written to a data area of the local storage. A checksum value of the patch files written in the data area is calculated. The checksum value with the original checksum value is compared to determine integrality of the patch files.
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| Data verification using checksum sidefile | 20100318887 | 20101216 |
| Exemplary method, system, and computer program product embodiments for data verification in a storage system are provided. A read of data is asynchronously submitted to nonvolatile storage media. A read of a first checksum signature is submitted to a solid state, sidefile memory location of a storage controller in the storage subsystem. The first checksum signature is representative of the data previously written to the nonvolatile storage media. A second checksum signature is calculated from the read of the data. The first and second checksum signatures are compared. If a match is not determined, a critical event is reported.
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| Method for synchronizing data maintained at a plurality of nodes | 20100309933 | 20101209 |
| A method for synchronizing data maintained at a plurality of data objects. The method involves assembling source and destination trees, each of the source and destination trees including a root node and one or more dependent nodes associated with source and destination data maintained at the plurality of data objects respectively. After the trees are assembled, a checksum calculation is performed for the nodes of the source tree and the destination tree based on the associated source data and the associated destination data maintained at the plurality of data objects respectively. The destination tree and the destination data are synchronized with the source tree and source data based on the comparison of the checksum calculations of corresponding nodes in the source tree and the destination tree.... |
| Apparatus for correcting single bit insertion or deletion in a data payload with a checksum corrector | 20100306612 | 20101202 |
| This application discloses a message format including a data payload of N bits and a corrector component encoding a checksum to correct the checksum of single bit slipping noise, where the checksum is the sum of each data payload bit by its position modulo N+1. The corrector component may encode a second checksum derived from the checksum that may also be included in the message and so on. Apparatus embodiments may include a transmitter generating a transmitted message of this format and/or a receiver using a received message that may be corrupted from the transmitted message through bit slipping in the form of bit insertion or bit deletion.
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| Method for managing the reset of a data processor | 20100306518 | 20101202 |
| A method for managing the reset of a data processor comprises receiving a first software reset instruction to reset software for operating the data processor. A checksum or value in a data storage register is modified according to a first preestablished logical or mathematical operation in response to the first software reset instruction. A software watchdog reset flag is set in response to the first software reset instruction. A reset is identified as a software reset if the software watchdog reset flag is set and if the checksum in the data storage register is modified in accordance with the first preestablished mathematical or logical operation.
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| Serial data communication - can memory error detection methods | 20100299585 | 20101125 |
| A method is provided for formatting a message, with a first plurality of bits forming a data component, and a second plurality of bits forming a reserved component, for transmission in a vehicle. The method comprises the steps of calculating an initial checksum from the data component, calculating a revised checksum at least from the initial checksum, and storing the revised checksum in the reserved component. The number of bits in the reserved component is less than the number of bits in the data component.
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| Method and system for assuring integrity of deduplicated data | 20100299311 | 20101125 |
| The present invention provides for a system and method for assuring integrity of deduplicated data objects stored within a storage system. A data object is copied to secondary storage media, and a digital signature such as a checksum is generated of the data object. Then, deduplication is performed upon the data object and the data object is split into chunks. The chunks are combined when the data object is subsequently accessed, and a signature is generated for the reassembled data object. The reassembled data object is provided if the newly generated signature is identical to the originally generated signature, and otherwise a backup copy of the data object is provided from secondary storage media.
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| Method and apparatus for identifying and characterizing errant electronic files | 20100293621 | 20101118 |
| A computer system includes a server having a memory connected thereto. The server is adapted to be connected to a network to permit remote storage and retrieval of data files from the memory. A file identification application is operative with the server to identify errant files stored in the memory. The file identification application provides the functions of: (1) selecting a file stored in said memory; (2) generating a unique checksum corresponding to the stored fire; (3) comparing said unique checksum to each of a plurality of previously generated checksums, wherein the plurality of previously generated checksums correspond to known errant files; and (4) marking the file for deletion from the memory if the unique checksum matches one of the plurality of previously generated checksums.
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| Method and apparatus for establishing a streamed media session | 20100293445 | 20101118 |
| A method and an arrangement for enabling a communication session for streamed media between a client terminal and a server. A request-to-establish message is sent (202) from the client terminal, supplemented with a checksum generated (200) for available SDP information. The checksum is compared to a checksum generated for correct SDP information available at the server. A response message indicating the result of the comparison is received from the server (204). If the comparison indicates that the SDP information available at the server is incorrect, the response message is supplemented with the correct SDP information, to update (210) the available SDP information. The client terminal is then sending a new request-to-message supplemented with the updated SDP information. On the other hand, if the available SDP information... |
| Apparatus and method for optimizing file transfer based upon available bandwidth | 20100293024 | 20101118 |
| A file transferring method and system (FTMS) optimizes delivery of targeted advertisement files (TAF) to different target groups (TG) that consist of mobile handheld display device (MHDD) users. A server transmits small metadata packets containing a transmission schedule, target group identification (TGID), and information on each TAF, such as file identification, checksum, file size, and number of packets in the file to each MHDD which, on receipt of this metadata, checks the TGID in the metadata packet with a pre-stored TGID in the MHDD. If the TGID received matches the TGID stored in the MHDD, then the MHDD downloads and stores the metadata information. The MHDD then wakes-up during scheduled advertisement (AD) file transmission and downloads the TAFs. The MHDD uses the metadata to verify whether... |
| Digital broadcasting system and method of processing data in digital broadcasting system | 20100275097 | 20101028 |
| A digital broadcasting system and a method of processing data is disclosed. A receiving system of the digital broadcasting system may include receiving system may include a signal receiving unit, a demodulating unit, a deinterleaver, and a decoder. The signal receiving unit receives a broadcast signal including mobile service data. The mobile service data may construct a code block, the code block including at least one data packet for the mobile service data, an RS parity generated based on the at least one data packet, and a CRC checksum generated based on the at least one data packet and the RS parity. The demodulating unit performs demodulation on the received mobile service data. The deinterleaver deinterleaves the demodulated mobile service data. The decoder corrects error generated... |
| Method for securely transmitting control data from a secure network | 20100275031 | 20101028 |
| This method securely transmits data from a secure control system [110] located on an isolated computer network [100] to a separate computer [210] outside the isolated control network [100]. The method includes several features designed to minimize the risk of outside cyber attack on the control system [110] while ensuring that the data is transmitted correctly and promptly. The system uses a non-routable unidirectional physical data link [300]. Messages [400] are redundantly transmitted to computer [210] without acknowledgement along with checksums [430,450]. The checksum information is used to validate that the message header [420] and the message data [440] have been received correctly. Redundant information contained in repeated message data blocks [440] is discarded after the transmitted message [400] is correctly received and decoded. An ordered... |
| Packet fragment handling | 20100265967 | 20101021 |
| A packet header processing engine includes a packet processing unit that is configured to generate the packet header information based on the packet header data. A checksum generating unit is connected to the packet processing unit. The checksum generating unit is configured to compute and store a partial checksum for a packet header being processed by the packet processing unit. After all packet header information for a packet is stored in the buffer, the checksum generating unit contains a complete checksum for the packet header.
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| Method for the transmission of additional data along with navigation messages in a satellite navigation system | 20100265136 | 20101021 |
| A method for transmitting additional information in a satellite navigation system includes providing a navigation message including a continuous data stream having a prescribed bit rate and structuring the navigation message in a plurality of pages generated according to a prescribed page definition so as to transmit information, wherein each of the plurality of pages includes a checksum calculated as a function of information contained in the page. The method further includes generating at least one new page containing the additional information so as to form a changed, navigation message according to a further page definition that differs from the prescribed page definition such that the checksum calculated as a function of information contained on the page generated according to the prescribed page definition is false;... |
| High integrity data network system and method | 20100262887 | 20101014 |
| A system for transmitting information data packets over a network includes a plurality of parallel transmission channels, each receiving interleaved data words constituting the data packets. Each channel includes a corresponding check sum data generator to compute check sum data for a corresponding sequence of data words. A logic circuit responsive to the interleaved data words from each channel performs an arithmetic operation on the data words from those channels to generate a parity data stream onto a separate channel. A check sum data generator computes checksum data based on the parity data stream. An encoder device downstream from each checksum data generator encodes the data and checksum from each channel for serial transmission over a network.
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| Method and system for post-build modification of firmware binaries to support different hardware configurations | 20100262816 | 20101014 |
| A firmware data processing system may be operable to allocate a configuration area in the firmware binary image file for customizable settings. During the firmware build process for the firmware binary image file, default configuration information may be inserted into this configuration area. This default configuration information may be either actual default setting values or indicator to use the default setting values. During post-build modification process, a separately created utility application may be operable to read in the original firmware binary image file, select new settings, and insert new configuration information into the configuration area. The utility application may also be operable to create a new firmware binary image file with reproduced checksums or other error detection mechanisms required for the original firmware binary image file,... |
| Reduced bandwidth cache coherency via checksum exchange | 20100257148 | 20101007 |
| A server system receives a first request for a data item from a web application on a client device, wherein the first request includes an identifier of the data item. In response to the first request, the server system calculates a first checksum of the data item and sends the data item and the first checksum to the web application, for storage in the local database. The server system receives a second request for the data item from the web application, calculates a second checksum of the data item and compares the first and second checksums. The server system, determines that the data item has been updated by comparing the first checksum to the second checksum; and in response to determining that the data item has... |
| Detection and correction of dropped write errors in a data storage system | 20100251072 | 20100930 |
| A RAID system is provided for detecting and correcting dropped writes in a storage system. Data and a checksum are written to a storage device, such as a RAID array. The state of the data is classified as being in a “new data, unconfirmed” state. The state of written data is periodically checked, such as with a timer. If the data is in the “new data, unconfirmed” state, it is checked for a dropped write. If a dropped write has occurred, the state of the data is changed to a “single dropped write confirmed” state and the dropped write error is preferably corrected. If no dropped write is detected, the state is changed to a “confirmed good” state. If the data was updated through a read-modified-write... |
| System and method for bandwidth optimization in data transmission using a surveillance device | 20100246669 | 20100930 |
| Systems and methods for bandwidth optimization in data transmission using a surveillance device are described here. In one aspect, embodiments of the present disclosure include a method for protecting data security and optimizing bandwidth. The method, which may be embodied on a system, includes computing a checksum value of a data block, storing the checksum value of the data block in a computer readable storage medium, transmitting the data block to a remote server, computing an updated checksum value of an updated data block at a subsequent time, and/or comparing the updated checksum value with the checksum value stored in the computer-readable storage medium. In response to determining that the updated checksum value is not equal to the checksum value, the updated data block can be... |
| Issuing machine and issuing system | 20100244429 | 20100930 |
| An issuing system for issuing unmodifiable and/or unforgeable hardcopy documents or securities includes a server and a plurality of issuing machines connected to the server via a network. Each of the issuing machines receives an ID recording medium provided by a potential purchaser, retrieves an identification recoded in the received ID recording medium, requests the potential purchaser to input request for a transaction of the security or fixed rate financing instrument, processes the requested transaction by retrieving information via a network from the server, and prints out on demand a hardcopy of the security or fixed rate financing instrument as purchased by the potential purchaser and a checksum thereon. A method for forming a new market with the issuing system.
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| Method and apparatus for calculating frame check sequence | 20100241936 | 20100923 |
| One embodiment provides a system for calculating a checksum for a packet. During operation, the system receives a packet, pads the received packet with a number of bits having predetermined values, and calculates an initial checksum value for the padded packet. Subsequently, the system calculates a final checksum for the original packet by reversing the initial checksum value using the padded bits with predetermined values
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| Fault-tolerant system | 20100241909 | 20100923 |
| In a lockstep fault-tolerant system (10), each subsystem (1, 2) includes bridges (71 to 75) positioned between a CPU (21) and memory (11), between a CPU (22) and memory (12), between the CPU (21) and a northbridge (31), between the CPU (22) and the northbridge (31) and between the CPU (21) and the CPU (22) and creates checksums from relayed data, and an FT bus (81) for sending the created checksums to an FT controller (41). Furthermore, the FT controller (41) detects discrepancies by comparing checksums sent from the bridges (71 to 75) and checksums sent from the other subsystem received via a crosslink, and by this detects process discrepancies between the subsystems (1, 2).
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| Http range checksum | 20100228737 | 20100909 |
| A method and apparatus that include a hashing and retrieval module that receives an indicator of a portion of a file to access, generates a hash value of a local copy of the portion and generates a request for a remote copy of the portion of the file, the request including the hash value. A verification and response module receives the request for a portion of a server copy of a data file, the request including a first hashing value. The verification and response module retrieves the portion from a server storage device, generates a second hashing value from the portion, compares the first hash value and the second hash value and returns the portion of the file in response to a failed comparison of the... |
| Issuing machine and issuing system | 20100228675 | 20100909 |
| An issuing system for issuing unmodifiable and/or unforgeable hardcopy documents or securities includes a server and a plurality of issuing machines connected to the server via a network. Each of the issuing machines receives an ID recording medium provided by a potential purchaser, retrieves an identification recoded in the received ID recording medium, requests the potential purchaser to input request for a transaction of the security or fixed rate financing instrument, processes the requested transaction by retrieving information via a network from the server, and prints out on demand a hardcopy of the security or fixed rate financing instrument as purchased by the potential purchaser and a checksum thereon. A method for forming a new market with the issuing system.
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| Frame capture, encoding, and transmission management | 20100226441 | 20100909 |
| Example embodiments of the present disclosure provide techniques for improving the rendering and management of client desktops and the subsequent transmission to the remote client. The techniques may minimize the movement of frame data within the server, the amount of data to be compressed, the amount of data transmitted over the network, and the amount of data to be decompressed. Various embodiments are disclosed for merging rendering functions and encoding functions onto the same chip so that frame data does not need to be transferred, calculation of a tile-based checksum for determining which tiles have changed from frame to frame, the dropping of tiles waiting to be transmitted if network bandwidth or decode speed is limiting the transmission and an equivalent tile in a subsequent frame... |
| System, apparatus, and method for memory built in self testing using microcode sequencers | 20100223512 | 20100902 |
| Apparatuses, systems, and methods are disclosed for performing Built-In Self Tests (BIST) on memories. One such BIST includes loading microcode instructions into a main microcode sequencer and loading subroutine instructions into a subroutine microcode sequencer on the memory. The microcode instructions generate subroutine calls to the subroutine microcode sequencer. The subroutine instructions generate memory operation codes, address codes, and data codes for testing the memory device. BIST addresses are generated in response to the memory operation codes and the address codes. BIST data are generated in response to the memory operation codes and the data codes. Conventional memory commands are created by generating command signals, address signals, and data signals for the memory in response to the memory operation codes, the BIST data, and the BIST... |
| Method of dynamic protection of data during the execution of a software code in intermediate language in a digital apparatus | 20090328231 | 20091231 |
| The invention concerns a method for protecting the data of an application compiled in intermediate for execution executed on a digital apparatus equipped with a virtual machine managing the execution of the code via a execution stack defining at least one stack frame corresponding to a method called during the execution of the code. A secured execution mode of the code involves the determination of at least one global checksum associated with each stack frame and, each time that a datum of the code is manipulated, the calculation of a local checksum associated with that datum. The calculation is on one hand, on the global checksum associated with the stack frame corresponding to the manipulated datum and, on the other hand, on at least one part... |
| Systems, methods, and apparatuses to transfer data and data mask bits in a common frame with a shared error bit code | 20090319877 | 20091224 |
| Embodiments of the invention are generally directed to systems, methods, and apparatuses to transfer data and data mask bits in a common frame with a shared error bit code. A memory system uses data frames to transfer data between a host and a memory device. In some cases, the system may also transfer one or more data mask bits in a data frame (rather than via a separate bit lane). The system may generate an error bit checksum (such as a cyclic redundancy code or CRC) to cover the data bits and the data mask bits. In some embodiments, the data bits, data mask bits, and checksum bits are transferred in a common frame.
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| Extracting previous messages from a later message | 20090319617 | 20091224 |
| A message extraction system is described that extracts a previous message from a current message in a conversation thread. The message extraction system receives a current message and identifies a previous message candidate within the current message. The system determines a checksum of the previous message candidate and compares the determined checksum to a previously stored checksum of the previous message. If the two checksums match, the system extracts the previous message from the reply message rather than from the server.
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| Efficient in-band reliability with separate cyclic redundancy code frames | 20090313533 | 20091217 |
| Embodiments of the invention are generally directed to systems, methods, and apparatuses for efficient in-band reliability with separate cyclic redundancy code (CRC) frames. In some embodiments, a memory system uses data frames to transfer data between a host and a memory device. The system also uses a separate frame (e.g., a CRC frame) to transfer a CRC checksum that covers the data frames.
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| Method and system for changing safety-relevant data for a control device | 20090313481 | 20091217 |
| A system and method for changing safety-relevant data for a control device is provided wherein an authorized user inputs new or altered safety-relevant data, which is received on a data processing installation. A first checksum for the safety-relevant data is established and stored along with the safety-relevant data in at least one data record on the data processing installation. An enable code may also be stored in the at least one data record. This enable code may be produced by a code generator and encrypted by a key module. The data processing installation then reads back the safety-relevant data from a memory in the data processing installation, thereby allowing a comparison of the received safety-relevant data and the read back safety-relevant data. A second checksum is... |
| Method and arrangement for user friendly device authentication | 20090307748 | 20091210 |
| The present invention relates to fraud prevention and authentication of a device to a user. The method of authenticating a personal device according to the invention comprises a set up sequence, wherein at least a first preferred output format is selected by the user, and a device configuration verification sequence. In the device configuration verification sequence a checksum is calculated and converted to a user friendly output format based on the user selected preferred output format. In addition the checksum may be calculated based on variable, and user selectable, keying material. The personal device, after being authenticated according to the above, may be used to authenticate a second device.
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| Packet receiving apparatus and processing method for the same | 20090287843 | 20091119 |
| A packet receiving apparatus determines whether or not data to be stored in a buffer overlaps previously stored data based on information contained in a header portion of a received packet. If it is determined that the data overlaps, a checksum for the overlapping data is subtracted. If it is determined that the data does not overlap, a checksum for the data to be stored in the buffer is added.
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| Error detection on programmable logic resources | 20090282306 | 20091112 |
| Error detection circuitry is provided on a programmable logic resource. Programmable logic resource configuration data is loaded into a cyclic redundancy check (CRC) module where a checksum calculation may be performed. In one embodiment, the checksum may be compared to an expected value, which is a precomputed checksum on data prior to being programmed into or while data is being programmed into a programmable logic resource. In another embodiment, the expected value may be included in the checksum calculation. An output indicating whether an error is detected may be generated depending on the relationship between the checksum and the expected value, or on the value of the checksum. This output may be sent to an output pin that is accessible by user logic.
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| Error detection on programmable logic resources | 20090282306 | 20091112 |
| Error detection circuitry is provided on a programmable logic resource. Programmable logic resource configuration data is loaded into a cyclic redundancy check (CRC) module where a checksum calculation may be performed. In one embodiment, the checksum may be compared to an expected value, which is a precomputed checksum on data prior to being programmed into or while data is being programmed into a programmable logic resource. In another embodiment, the expected value may be included in the checksum calculation. An output indicating whether an error is detected may be generated depending on the relationship between the checksum and the expected value, or on the value of the checksum. This output may be sent to an output pin that is accessible by user logic.
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| Updating a file using differences and file format therefor | 20090271779 | 20091029 |
| A method for updating a local file and format for the local to be updated is described. An update file, which is a newer version of the local file, is accessible from a server over a network. A list of new hash values corresponding to data blocks of the update file is retrieved from the server. An algorithm locates divisions between the data blocks when a value of a rolling checksum reaches a particular value, the blocks being of variable size. New hash values of the update file are compared with local hash values of the local file. For each of the new hash values not having a matching local hash value, the corresponding data block is downloaded the server written to a new file. For... |
| Descriptor integrity checking in a dma controller | 20090271536 | 20091029 |
| The present invention relates to a Direct Memory Access controller that, in an embodiment, executes I/O descriptors conditionally. A linked list item contains a checksum computed on the descriptor fields. When the linked list item is fetched, the checksum is computed on the descriptor. If both checksums are equal, the linked list item is considered valid and the descriptor is executed. At the end of a DMA I/O, the next descriptor in the linked list is fetched. When the checksum fails, the descriptor is corrupted and the channel is stopped and an error is reported to the operating system.
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| Descriptor integrity checking in a dma controller | 20090271536 | 20091029 |
| The present invention relates to a Direct Memory Access controller that, in an embodiment, executes I/O descriptors conditionally. A linked list item contains a checksum computed on the descriptor fields. When the linked list item is fetched, the checksum is computed on the descriptor. If both checksums are equal, the linked list item is considered valid and the descriptor is executed. At the end of a DMA I/O, the next descriptor in the linked list is fetched. When the checksum fails, the descriptor is corrupted and the channel is stopped and an error is reported to the operating system.
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| Updating a file using differences and file format therefor | 20090271779 | 20091029 |
| A method for updating a local file and format for the local to be updated is described. An update file, which is a newer version of the local file, is accessible from a server over a network. A list of new hash values corresponding to data blocks of the update file is retrieved from the server. An algorithm locates divisions between the data blocks when a value of a rolling checksum reaches a particular value, the blocks being of variable size. New hash values of the update file are compared with local hash values of the local file. For each of the new hash values not having a matching local hash value, the corresponding data block is downloaded the server written to a new file. For... |
| Data protection for variable length records by utilizing high performance block storage metadata | 20090259456 | 20091015 |
| An enhanced mechanism for providing data protection for variable length records utilizes high performance block storage metadata. In an embodiment, an emulated record that emulates a variable length record, such as a Count-Key-Data (CKD) record or an Extended-Count-Key-Data (ECKD) record, is generated by a Host Bus Adapter (HBA) of a mainframe system. The emulated record comprises a sequence of extended fixed-length blocks, each of which includes a data block and a footer. A confluence of the footers defines a high performance block storage metadata unit associated with the emulated record and includes a checksum that covers all data blocks and all footers of the entire emulated record. In one embodiment, the checksum is checked during transit of the emulated record between a HBA and a storage... |
| Data protection method for variable length records by utilizing high performance block storage metadata | 20090259924 | 20091015 |
| An enhanced mechanism for providing data protection for variable length records utilizes high performance block storage metadata. In an embodiment, an emulated record that emulates a variable length record, such as a Count-Key-Data (CKD) record or an Extended-Count-Key-Data (ECKD) record, is generated by a Host Bus Adapter (HBA) of a mainframe system. The emulated record comprises a sequence of extended fixed-length blocks, each of which includes a data block and a footer. A confluence of the footers defines a high performance block storage metadata unit associated with the emulated record and includes a checksum that covers all data blocks and all footers of the entire emulated record. In one embodiment, the checksum is checked during transit of the emulated record between a HBA and a storage... |
| Export of metadata streams to applications | 20090248887 | 20091001 |
| The present invention provides a computer storage server implemented method for generating attribute streams. The storage server receives a request from an application to write data to at least one storage object, the request having a request type. The storage server then updates an attribute stream with metadata associated with the at least one storage object. The storage server also updates the attribute stream with the at least one checksum, such that the attribute stream is associated with the at least one storage object. The storage server determines the request type to be one selected from among the group consisting of an email type, a file transfer protocol type, and a hypertext transfer protocol type. Responsive to a determination that the request type is among one... |
| Method and system for assuring integrity of deduplicated data | 20090234892 | 20090917 |
| The present invention provides for a system and method for assuring integrity of deduplicated data objects stored within a storage system. A data object is copied to secondary storage media, and a digital signature such as a checksum is generated of the data object. Then, deduplication is performed upon the data object and the data object is split into chunks. The chunks are combined when the data object is subsequently accessed, and a signature is generated for the reassembled data object. The reassembled data object is provided if the newly generated signature is identical to the originally generated signature, and otherwise a backup copy of the data object is provided from secondary storage media.
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| Method and system for assuring integrity of deduplicated data | 20090234892 | 20090917 |
| The present invention provides for a system and method for assuring integrity of deduplicated data objects stored within a storage system. A data object is copied to secondary storage media, and a digital signature such as a checksum is generated of the data object. Then, deduplication is performed upon the data object and the data object is split into chunks. The chunks are combined when the data object is subsequently accessed, and a signature is generated for the reassembled data object. The reassembled data object is provided if the newly generated signature is identical to the originally generated signature, and otherwise a backup copy of the data object is provided from secondary storage media.
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| Determining unique material identifier numbers using checksum values | 20090207998 | 20090820 |
| A system and method for determining unique material identifier numbers using checksum values are disclosed herein. The system and method involves providing a set of data, loading the set of data into at least one processor, using at least one algorithm with at least one processor to calculate a checksum value based on the data content of the set of data, and using the checksum value as the unique material identifier number for the set of data. In some embodiments, at least one algorithm is a Message-Digest algorithm 5 (MD5) and/or a Secure Hash Algorithm (SHA) hash function. In one or more embodiments, the set of data may be a data set from a single digital picture file, a data set from a single digital audio... |
| Determining unique material identifier numbers using checksum values | 20090207998 | 20090820 |
| A system and method for determining unique material identifier numbers using checksum values are disclosed herein. The system and method involves providing a set of data, loading the set of data into at least one processor, using at least one algorithm with at least one processor to calculate a checksum value based on the data content of the set of data, and using the checksum value as the unique material identifier number for the set of data. In some embodiments, at least one algorithm is a Message-Digest algorithm 5 (MD5) and/or a Secure Hash Algorithm (SHA) hash function. In one or more embodiments, the set of data may be a data set from a single digital picture file, a data set from a single digital audio... |
| System and method for converting multichannel time division multiplexed data into packets | 20090180494 | 20090716 |
| A system and method are provided for converting multichannel serial data streams into packets. The method accepts a plurality of serial data streams in a corresponding plurality of channels. In a time domain multiplexed (TDM) fashion, groups with an undetermined number of data bits are packed from each data stream, into an associated channel segment queue, where each segment includes a predetermined number of bits. In a TDM fashion, segments are loaded into an associated channel payload queue, where each payload includes a predetermined number of segments. Once a payload is filled, an associated pointer is created in a pointer queue. The method selects a pointer from the pointer queue, creates a packet from the payload associated with the selected pointer, and transmits the packet via... |
| Memory access assist | 20090182925 | 20090716 |
| A method and apparatus are provided for facilitating access from a control system to the memory of a processor across two buses, one of which acts as a bottleneck to communication between the control system and the processor. A bridge between the two buses acts as an intermediary. The control system issues simple diagnosis and data loading verification commands across a slow bus to the bridge. The bridge then performs the data intensive tasks by communicating with the processor through a faster bus. The bridge writes and reads data to the processor, and generates checksums of the written and read data. The bridge then returns status information to the control system indicative of the comparison of the checksums. In the case of memory diagnosis, the control... |
| Memory system with cyclic redundancy check | 20090183051 | 20090716 |
| A memory system, with a memory controller and a memory module, is configured to transfer error securing data and address signals within signal frames between the memory controller and the memory module. The memory system includes: an address register configured to pre-store an address signal associated with at least one block of data signals to be transferred, and at least one cyclic redundancy checksum calculator included in one of the memory controller and the memory module, the calculators being configured to calculate a cyclic redundancy checksum for the at least one data signal block, wherein the pre-stored address signal is used as an initial value for the calculation of the cyclic redundancy checksum and the at least one block of data and address signals are transferred... |
| Communications channel interposer, method and program product for verifying integrity of untrusted subsystem responses to a request | 20090183058 | 20090716 |
| In a communications channel coupled to multiple duplicated subsystems, a method, interposer and program product are provided for verifying integrity of subsystem responses. Within the communications channel, a first checksum is calculated with receipt of a first response from a first subsystem responsive to a common request, and a second checksum is calculated for a second response of a second subsystem received responsive to the common request. The first checksum and the second checksum are compared, and if matching, only one of the first response and the second response is forwarded from the communications channel as the response to the common request, with the other of the first response and the second response being discarded by the communications channel.
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| Method and system for updating topology changes of a computer network | 20090177953 | 20090709 |
| A method for detecting topology changes of a computer network, includes the following steps of acquisition of the raw data from the configuration tables of the network elements during successive primary pollings, the following steps being carried out between two successive primary pollings: calculation and storage of a checksum value for each network element having raw data which are considered to be sensitive, at least one secondary polling, allowing the sensitive data to be retrieved again from each corresponding element, comparison of the previously-stored checksum value, at each secondary polling and for each element termed sensitive, with a new checksum value calculated with the new sensitive data, for each sensitive element, when the two checksum values differ, updating in a topology database only the topology data... |
| Tcp data reassembly | 20090161568 | 20090625 |
| Method and apparatus for processing computer network data. An embodiment of the invention comprises a first device for receiving a stream of data, said stream comprising at least a first data frame, said first data frame having been sent from a second device 101 to a third device 201, the first data frame containing a payload section and at least one header section, the first device comprising: a TCP data reassembly apparatus 10 communicatively coupled to a monitoring application 16 and a memory 14. The TCP data reassembly apparatus 10 is adapted to receive the stream of data and classify the first data frame as containing one of a TCP/IP segment, a UDP/IP datagram, a non-TCP/UDP IP packet, and a non-IP packet; supply the monitoring application... |
| Tcp data reassembly | 20090161568 | 20090625 |
| Method and apparatus for processing computer network data. An embodiment of the invention comprises a first device for receiving a stream of data, said stream comprising at least a first data frame, said first data frame having been sent from a second device 101 to a third device 201, the first data frame containing a payload section and at least one header section, the first device comprising: a TCP data reassembly apparatus 10 communicatively coupled to a monitoring application 16 and a memory 14. The TCP data reassembly apparatus 10 is adapted to receive the stream of data and classify the first data frame as containing one of a TCP/IP segment, a UDP/IP datagram, a non-TCP/UDP IP packet, and a non-IP packet; supply the monitoring application... |
| Scalable error detection and cross-session timing synchronization for packet-switched transmission | 20090154495 | 20090618 |
| A system and method for providing improved scalable error detection and cross-timing synchronization for packet-switched transmission. In one embodiment, checksum error detection is applied for the core layer and for enhancement layers of the scalable payload in such a way that dropping one or several enhancement layers from the payload does not change the value of the checksum. Only one checksum is transmitted, e.g., in the payload or in the header of the lower-layer protocol. The transmitter modifies the encoded bit stream in such a manner that the entity in the network deploying the scalable payload and removing layers from the packet does not need to recalculate the checksum placed in the payload or packet header, even when the payload size is changed. A prefix/tail bit... |
| Method and system for using protocol checksums to convey data | 20090154361 | 20090618 |
| The present invention provides a system and method for transmitting data, including transmitting a first data packet having at least one checksum value across a network, generating a second data packet substantially similar to the first data packet, the second data packet having a checksum value, modifying the checksum value of the second data packet, transmitting the second data packet with the modified checksum value across the network, and assessing a network performance metric based at least in part upon the modified checksum value.
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| Fixed client identification system for positive identification of client to server | 20090144555 | 20090604 |
| A tamperproof ClientID system to uniquely identify a client machine is invoked upon connection of a client application to a backend. Upon initial connection, the backend issues a unique ClientID containing a checksum. The client application prepares at least two different scrambled versions of the ClientID and stores them in respective predetermined locations on the client machine. Upon subsequent connection to the backend, the client application retrieves and unscrambles the values at the two locations, verifies the checksums and compares the values. If the checksums are both correct and the values match, the ClientID value is sent to the backend, otherwise the client application sends an error code.
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| Surrogate stream for monitoring realtime media | 20080310316 | 20081218 |
| In one embodiment, a separate surrogate monitor stream provides real-time media monitoring statistics for non-media savvy protocols. The surrogate monitor stream contains packet transmission parameters, such as sequence numbers and time stamps, for associated media packets in the non-savvy media stream. The surrogate monitor stream also contains checksums derived from the media packets. The checksums are used to correlate the packets in the surrogate monitor stream with the media packets in the media stream. The information in the surrogate monitor stream is then used in conjunction with the non-savvy media stream to provide real-time media monitoring without having to modify existing infrastructure. For example, head-end video servers do not have to add Real-time Transport Protocol (RTP) support or deal with protocol upgrades like RTP/UDP co-existence.
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| Manufacturing system and method using ir communications link | 20080310836 | 20081218 |
| An automated test system for testing devices being manufactured comprises an infrared communications link for free space communications between a host and a device under test. The communications link is asymmetric and instructions from the host are acknowledged by the device. The instructions cause the device to operate, and the output of the device is monitored, logged, and compared to acceptance criteria. The host can then generate calibration messages to the device, to change the device operating characteristics as appropriate. The communications link uses an unmodulated data stream together with asynchronous handshaking and a robust checksum algorithm to ensure accurate communication.
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| Method for identifying and authenticating goods using codes, bar codes and radio frequency identification | 20080296362 | 20081204 |
| Methods are provided for identifying and authenticating goods. A code or checksum based on information or an image relating to a good is derived and associated with a barcode to include on a label. The label is scanned by a recipient to authenticate the goods. Scanable code are provided based on an image by distilling an image into its hue components and using a grid to create a pattern. The pattern is readable by a scanner to obtain a code directly, or by consulting a look-up table. The code, barcode, digital barcode or scanable code can be included on a label or tag, such as an RFID tag.
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| Packet transmission device and packet transmission method | 20080301537 | 20081204 |
| Aiming to shorten the transmission operation, the present invention provides an apparatus including a memory, a checksum calculation circuit, and a transmission device. The memory stores data of a packet to be transmitted. The checksum calculation section reads data sets corresponding to all the packet fragments except for that having a checksum storage area, sequentially and cumulatively adds the data sets to obtain a checksum value, thereafter reads a data set corresponding to the fragment having the checksum storage area therein from the memory, and adds the read data to the checksum value to obtain a final checksum value. The transmission section sequentially transmits the fragments once the individual fragments are used for the checksum calculation in the checksum calculation section, and, thereafter, transmits the fragment... |
| Method and apparatus for video frame marking | 20080291999 | 20081127 |
| Method and apparatus for marking individual video frames of an H.264/AVC standard compliant or equivalent digital video stream. Each video frame in a H.264/AVC video stream is conventionally divided into NAL units. There are typically a number of NAL units for each video frame. There is specified in the H.264/AVC standard the SEI (Supplemental Enhancement Information) type. This type includes the user data unregistered type, which can contain arbitrary data. In the present method and apparatus, an NAL unit of this type is provided at the beginning of each video frame, preceding the other NAL units associated with that video frame. The data contained in that special SEI unit is typically control information for downstream control of use of the video content. Examples of the type... |
| Method and system for implementing a forward error correction (fec) code for ip networks for recovering packets lost in transit | 20080285476 | 20081120 |
| Certain aspects of a method and system for implementing a forward error correction (FEC) code for Internet Protocol (IP) networks for recovering data packets lost in transit may be disclosed. At least one forward error correction (FEC) packet comprising a first checksum of at least one selected subset of a plurality of data packets may be received by the client. A second checksum of the selected subset of the plurality of data packets excluding one or more lost data packets may be calculated. One or more lost data packets may be recovered based on comparing the first checksum with the calculated second checksum.
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| Method and device for controlling distribution and use of digital works | 20080288412 | 20081120 |
| The present invention relates to a method and device for controlling distribution and use of a digital work stored together with an attached usage right information on a record carrier. The attached usage right information is encrypted or verified by using a hidden information which is changed at every change of said usage right information. The hidden information may be an encryption key used for encrypting the usage right information, or a checksum of a data block containing the usage right information. Thus, a “copy and restore attack” is not successful, since it will lead to a mismatch between the hidden information and the restored usage right information.
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| System for backing up and recovering data applied to data processing apparatus and method for the same | 20080288557 | 20081120 |
| The invention discloses a data backup/recovery system for backing up and recovering data in a data processing apparatus. The data processing apparatus comprises a Basic Input Output System (BIOS) with a memory, a System Data Security Module (SDSM), and the data backup/recovery system. The SDSM is used for storing a backup data and has a real time clock. The data backup/recovery system determines whether the backup data should be recovered to the BIOS by checking whether the checksum of the memory fails and whether there is a copy of the backup data stored in the SDSM. Finally, the data backup/recovery system backs up the data stored in the memory to the SDSM. Accordingly, the data backup/recovery process is accomplished.
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| Method and system for proactively monitoring the coherency of a distributed cache | 20080282039 | 20081113 |
| A method of proactively monitoring the coherency of a distributed cache. A cache comparison utility selects a set of cache keys from a replica cache connected to a main cache via a network. The cache comparison utility selects a first cache key from the set of cache keys and fetches a first cache value from the replica cache that corresponds to the first cache key. The cache comparison utility generates a first checksum value corresponding to the first cache value and the first cache key and stores the first checksum value in a first checksum table. The cache comparison utility creates a first total checksum value that corresponds to the first checksum table and compares the first total checksum value with multiple total checksum values that... |
| Method for authentication of sensor data, and an associated sensor | 20080276092 | 20081106 |
| A method for authentication of sensor data (D) which is interchanged between at least one sensor (S1 to S4) and an associated receiver (2), in which a request (challenge) is first of all transmitted by the receiver (2) to the at least one sensor (S1 to S4) with an encrypted random number, this request is decrypted by the at least one sensor (S1 to S4), the random number is modified and the modified random number is used as a session key for the subsequent sensor data transmission (response). A first hash value (H) is calculated from the sensor data (D) at the sensor end; a cryptographic checksum (DS) is produced for authentication of the sensor data (D) to be transmitted, a second hash value (H′) is... |
| Apparatus for writing information on a data content on a storage medium | 20080256365 | 20081016 |
| An apparatus for writing checksum information on a data content on a storage medium. The apparatus has a provider for providing checksum information based on the data content and a writer for writing the data content and the checksum information on the storage medium such that a baseline reader and an enhanced reader can read the data content, the enhanced reader can read and process the checksum information, and the baseline reader ignores, skips or does not read the checksum information.
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| Error checking addressable blocks in storage | 20080256420 | 20081016 |
| Provided are a method, system, and article of manufacture for error checking addressable blocks in storage. Addressable blocks of data are stored in a storage in stripes, wherein each stripe includes a plurality of data blocks for one of the addressable blocks and at least one checksum block including checksum data derived from the data blocks for the addressable block. A write request is received to modify data in one of the addressable blocks. The write and updating the checksum are performed in the stripe having the modified addressable block. An indication is made to perform an error checking operation on the stripe for the modified addressable block in response to the write request, wherein the error checking operation reads the data blocks and the checksum... |
| Intelligent error checking method and mechanism | 20080250307 | 20081009 |
| An intelligent streaming media error check detection method and apparatus. The claimed invention discloses an apparatus and method where all streaming media are initially assumed to have compatible error checksums. A parameter W is initialized to zero. The parameter W is not constant and conceptually represents a state of the error check method. The destructive value of a first predefined constant is added to the parameter W each time the acceptability of a data set cannot be verified. The constructive value of a second predefined constant is subtracted from the parameter W each time the acceptability of a data set is successfully verified. If the value of the parameter W equals or exceeds a predefined threshold, the remainder of the streaming media is decoded and played... |
| Methods and apparatus to perform file transfers in distributed file systems | 20080244030 | 20081002 |
| Methods and apparatus to send and receive files are disclosed. An example method for sending a file includes sending a list of data nodes storing a first portion of the file and a second portion of the file to a master node of a destination distributed file system, computing a first checksum for a first portion of the file, computing a second checksum for a second portion of the file, sending the first checksum and the second checksum to the destination distributed file system, sending the first portion of the file to a first data node of the destination distributed file system, and sending the second portion of the file to a second data node of the destination distributed file system.
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| Method for controlling access to data of a tape data storage medium | 20080244154 | 20081002 |
| A method, system, and machine-readable medium for controlling access to data of a tape data storage medium are disclosed. In accordance with one embodiment, a method is provided which comprises conveying data access control metadata from a tape cartridge comprising a tape data storage medium to a host, receiving decrypted metadata from the host, comparing a checksum value determined utilizing the decrypted metadata with checksum data stored within the tape cartridge; and processing a request to access the tape data storage medium received from the host based upon a comparison of the checksum value and checksum data. In the described method embodiment, the data access control metadata comprises encrypted metadata corresponding to a data storage parameter, where data is stored within the tape data storage medium... |
| Simple universal hash for plaintext aware encryption | 20080226063 | 20080918 |
| A simple universal hash apparatus and method include input means for inputting at least one of a plurality of Plaintext blocks into an integrity aware encryption scheme using at least one of two secret keys to obtain a plurality of Ciphertext blocks; Plaintext checksum means for computing a Plaintext checksum value from said plurality of Plaintext blocks; Ciphertext checksum means for processing said plurality of Ciphertext blocks and a third key to obtain a Ciphertext checksum; and combination means for combining said Plaintext checksum and said Ciphertext checksum to obtain the simple universal hash value.
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| Error detection in a communications link | 20080229174 | 20080918 |
| An integrated circuit communications interface operable consistent with multiple data transmission protocols includes error detection circuitry that implements a cyclic redundancy check (i.e., CRC) function. The error detection circuitry generates a checksum based, at least in part, on a selected one of the multiple data transmission protocols. The error detection circuitry includes at least one circuit that generates a digital code according to an operation including terms common to the multiple data transmission protocols. That digital code is combined with a selected digital code to generate the CRC. The selected digital code is generated by an individual circuit corresponding to a respective one of the multiple data transmission protocols. The individual circuit generates the selected digital code according to an operation including at least terms exclusive... |
| Efficient techniques for error detection and authentication in wireless networks | 20080220742 | 20080911 |
| Various example embodiments are disclosed relating to efficient techniques for error detection and authentication in wireless networks. For example, according to an example embodiment, an apparatus adapted for wireless communication in a wireless network may include a processor. The processor may be configured to transmit a message including a field to provide both authentication and error detection for the message. The field may include an authenticated checksum sequence.
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| System and method of identification of dangling pointers | 20080222224 | 20080911 |
| A method and system to identifying the use of dangling pointers in software instrumentation irrespective of the location of the pointer in the memory. The main memory is preferably segmented into three parts defined as a first memory, a version segment and a pointer version segment. By use of the version segment and pointer version stored in the pointer version segment, checksum are made on a pointer version with a version on dereferencing a pointer in the first memory to identify references to a dangling pointer on negative determination. Identified dangling pointer may be reported to the end user.
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| Protocol data units and header in multihop relay network | 20080212513 | 20080904 |
| The invention provides a data structure embodied in a computer readable media. The data structure is a protocol data packet (PDU) communicated in a mobile multihop network between stations. The data structure includes a relay media access header, a payload and an optional cyclical redundancy checksum for the protocol data unit; and an indication whether the PDU is a relay media access protocol data unit or not.
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| Method and apparatus for transmitting and receiving voip packet with udp checksum in wireless communication system | 20080212566 | 20080904 |
| A method and apparatus for transmitting a voice packet through a radio link in a mobile communication system providing a voice service through a packet network inter-working with the Internet are provided, in which a voice packet based on an Internet protocol (e.g. a VoIP packet) is received, the voice packet comprising headers including a User Datagram Protocol (UDP) checksum; the voice packet is verified by using the UDP checksum, to determine if the voice packet has an error; the headers are compressed to construct a header-compressed packet including the UDP checksum and a Cyclic Redundancy Check (CRC) code calculated for other header fields, except for the UDP checksum from among the headers, when the voice packet has no error, the UDP checksum from the header-compressed... |
| Template based parallel checkpointing in a massively parallel computer system | 20080215916 | 20080904 |
| A method and apparatus for a template based parallel checkpoint save for a massively parallel super computer system using a parallel variation of the rsync protocol, and network broadcast. In preferred embodiments, the checkpoint data for each node is compared to a template checkpoint file that resides in the storage and that was previously produced. Embodiments herein greatly decrease the amount of data that must be transmitted and stored for faster checkpointing and increased efficiency of the computer system. Embodiments are directed to a parallel computer system with nodes arranged in a cluster with a high speed interconnect that can perform broadcast communication. The checkpoint contains a set of actual small data blocks with their corresponding checksums from all nodes in the system. The data blocks... |
| Receiver with adaptive strobe offset adjustment | 20080205565 | 20080828 |
| Receiver for receiving a data stream via a data bus, which receiver samples the bits of the data stream in an over-sampling process, in which n bit strobe offsets are used and n data sets with i bits are sampled,—applies a decision criterion for identifying those data sets with correct bit values. This decision uses checksum CRC,—selects one of the identified data sets with correct bit values and—uses the bit strobe offset, which was used for receiving the selected data streams, for receiving the data stream. In this way the multiphase clock with optimal phase shifts is selected.
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| Method for verifying data consistency of backup system, program and storage medium | 20080208923 | 20080828 |
| A technology for verifying backup data capable of synchronizing timings of checksum calculation and verifying data consistency regardless of the storing position of the data is provided. In a backup system using a data update log, a checksum of data of a backup source and a checksum of backup data are checked, thereby verifying data consistency. Data check log generation means and the like are provided so that the data update log and the data check log are transmitted in order to a secondary site. By this means, the timings of the checksum calculation are synchronized. Further, by providing data area extraction means and the like, the verification of data consistency can be performed regardless of the storing position of the data.
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| Annotation validity using partial checksums | 20080209310 | 20080828 |
| Embodiments of the present invention generally provide a system, method and article of manufacture for validating annotations describing one or more portions of a data object. In general, prior to displaying a requested annotation, a current change detection value may be calculated from current data extracted from portions of the data object described by the annotation. The current change detection value may be compared to a previously saved change detection value calculated from data extracted from the portions of the data object at the time the annotation was generated. A mismatch in the current change detection value and the previously saved change detection value indicates a change in the annotated portions of the data object, which may render the annotation invalid. The annotated portions of the... |
| Method and apparatus for facilitating secure distributed content delivery | 20080199003 | 20080821 |
| One embodiment of the present invention provides a system that facilitates receiving content from a primary peer and forwarding it to a secondary peer, wherein blocks of the content are sent to the secondary peer prior to all of the blocks of the content being received from the primary peer. The system starts by receiving an encrypted list of checksums from a server, wherein each checksum in the list is associated with a corresponding block of the content. Next, the system decrypts the encrypted list of checksums to form a list of decrypted checksums. The system then receives a block of the content from the primary peer and calculates a checksum for the block of the content. The system subsequently compares the calculated checksum with a... |
| Systems and methods for verifying gaming machine cash out tokens | 20080200240 | 20080821 |
| Systems and methods for verifying a cash out token associated with a gaming machine. The systems and methods include a gaming machine receiving a cash out token that contains an encoded data field and an encoded checksum field. A checksum algorithm is then performed on at least a portion of the encoded data field to produce a numerical result, which is then compared with the checksum field. Upon detecting a match between the produced numerical result and the checksum field, a data set is then extracted from the encoded data field, where a monetary value associated with the cash out token is determined. The player is then credited an equivalent amount of game credits to the validated value of the cash out token.
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| Template based parallel checkpointing in a massively parallel computer system | 20080195892 | 20080814 |
| A method and apparatus for a template based parallel checkpoint save for a massively parallel super computer system using a parallel variation of the rsync protocol, and network broadcast. In preferred embodiments, the checkpoint data for each node is compared to a template checkpoint file that resides in the storage and that was previously produced. Embodiments herein greatly decrease the amount of data that must be transmitted and stored for faster checkpointing and increased efficiency of the computer system. Embodiments are directed to a parallel computer system with nodes arranged in a cluster with a high speed interconnect that can perform broadcast communication. The checkpoint contains a set of actual small data blocks with their corresponding checksums from all nodes in the system. The data blocks... |
| Crc checking and mac-hs processing in an hsdpa-compatible receiver in a 3g wireless network | 20080186988 | 20080807 |
| In one embodiment, a method for processing a transport block having a MAC-hs protocol data unit (PDU) and a corresponding checksum in an HSDPA-compatible (high-speed downlink packet access) receiver in a 3GPP wireless communication network, the method including: (a) recovering the transport block, (b) performing, substantially in parallel: (i) a cyclic redundancy check (CRC) on the transport block to determine whether the transport block passes or fails, and (ii) MAC (media access control) disassembly to generate a modified MAC-hs PDU, and (c) determining whether to perform reordering-queue distribution and reordering on the modified MAC-hs PDU based on whether the transport block passes or fails. By performing the CRC check and disassembly substantially in parallel, processing efficiencies may be gained.
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| Method for auditing data integrity in a high availability database | 20080189498 | 20080807 |
| A method for maintaining the integrity of a backup database table on a secondary node against a continuously replicated and dynamically changing original database table on a primary node includes generating an original checksum of a segment of the original database table between a beginning record and an ending record. The checksum and identification data may be stored in an original control database table. The original control database table may be replicated to a backup control database table. Thereafter, a backup checksum of a segment of the backup database table between a beginning record and an ending record is generated. A comparison between the backup checksum and the original checksum is made in response to a triggering update to the backup control database table. Collisions by... |
| Compression and abbreviation for fixed length messaging | 20070299925 | 20071227 |
| A method, computer program product, and data processing system for compressing and abbreviating text messages at a first text messaging device for transport and subsequent interpretation at a second text messaging device is disclosed. A user-defined message length reduction profile for producing human-readable compressed text is associated with a source text message at a first text messaging device. The source text message is then shortened using abbreviations and transformation rules in the profile. The shortened text message can then be transmitted to a second text messaging device. In addition, the compression provided by the present invention, although intended to be human-readable, can be complemented with decompression software to expand the compressed and abbreviated text to its full length and verifying, using a checksum or other error... |
| Trusted evidence cameras and related methods and computer program products | 20070300074 | 20071227 |
| Digital Cameras configured to verify authenticity of digital photos taken with the digital camera and related methods and computer program products are provided. GPS information associated with a photograph taken with the digital camera is obtained. A checksum of pixels that make up the photograph and the obtained GPS information is generated. The generated checksum is encrypted using a private key associated with the digital camera so as to allow verification that the photograph has not been modified.
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| Multimedia transmitter, multimedia receiver, multimedia transmission system, and method for securely transmitting multimedia content over a wireless link | 20070300266 | 20071227 |
| Embodiments of multimedia transmitters, receivers and methods for communicating multimedia content in a wireless network are generally described herein. Other embodiments may be described and claimed. In some embodiments, a checksum is generated by decoding the multimedia content to respond to queries from a multimedia content source within a predetermined time period, a propagation delay associated with the wireless multimedia link is determined, and transmission of the multimedia content over the wireless multimedia link is inhibited when a response from the multimedia receiver exceeds a propagation delay by a predetermined time period.
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| Method for in-place, lightweight ack promotion in a wireless network environment | 20070286073 | 20071213 |
| A method for in-place, lightweight Ack packet promotion in a wireless network environment is provided. The method includes receiving a new Ack packet via a wireless network; searching through a transmit queue for an old Ack packet that corresponds to the new Ack packet; and replacing the data in a number field, a checksum field, a window size field, and a timestamp options field of the old Ack packet with data in a number field, a checksum field, a window size field, and a timestamp options field of the new Ack packet.
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| Simple universal hash for plaintext aware encryption | 20070286418 | 20071213 |
| A simple universal hash apparatus and method include input means for inputting at least one of a plurality of Plaintext blocks into an integrity aware encryption scheme using at least one of two secret keys to obtain a plurality of Ciphertext blocks; Plaintext checksum means for computing a Plaintext checksum value from said plurality of Plaintext blocks; Ciphertext checksum means for processing said plurality of Ciphertext blocks and a third key to obtain a Ciphertext checksum; and combination means for combining said Plaintext checksum and said Ciphertext checksum to obtain the simple universal hash value.
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| Method and a system for securing processing of an order by a mobile agent within a network system | 20070286424 | 20071213 |
| The present description refers to a method for securing processing of an order by a mobile agent from a first server (S0) within a network system with a plurality of servers (S0, S1, . . . ,Sn), at least a number of which the mobile agent has to pass according to an appropriate succession, wherein each of the plurality of servers has a pair of a public key (KS0, . . . ,KSi, . . . , KSn) and a private key (PKS0, . . . ,PKSi, . . . , PKSn) associated therewith, respectively, the method comprising, starting from any one of the number of servers the mobile agent has to pass, called herein the i'th server at least the steps of receiving the mobile... |
| Method, system and program product for validating a runtime environment | 20070288904 | 20071213 |
| A method, system and program product for validating a runtime environment deployed across multiple computing systems is disclosed. The method includes generating, using a validation tool, a first set of checksums corresponding to message flows in a first instance of a runtime module deployed on a first system, the validation tool excluding in the first set of checksums generated any unique system data corresponding to the first system, while reading only common executable data of the runtime module. The method further includes running the validation tool on at least a second system for generating a second set of checksums corresponding to message flows in a second instance of the runtime module deployed on the second system. Further, the method includes comparing the second set of checksums... |
| Method and system for detecting changes in a network using simple network management protocol polling | 20070276932 | 20071129 |
| In an embodiment, methods and systems have been provided for detecting changes in a network using improved Simple Network Management Protocol (SNMP) polling that reduces network traffic. Examples of changes in the network include, but are not limited to, configuration and behavioral changes in a network device, and response of network device to a network change. A Network Management Station (NMS) periodically polls Management Information Base (MIB) groups instead of periodically polling individual MIB object instances. The NMS receives the Aggregate Change Identifiers (ACIs) of MIB groups in response to polling, from a SNMP agent. The changes in the received ACIs represent the changes in the MIB groups. A change in an MIB group represents changes in the MIB object instances of the MIB group. The... |
| Method and system for controlling access to data of a tape data storage medium | 20070276991 | 20071129 |
| A method, system, and machine-readable medium for controlling access to data of a tape data storage medium are disclosed. In accordance with one embodiment, a method is provided which comprises conveying data access control metadata from a tape cartridge comprising a tape data storage medium to a host, receiving decrypted metadata from the host, comparing a checksum value determined utilizing the decrypted metadata with checksum data stored within the tape cartridge; and processing a request to access the tape data storage medium received from the host based upon a comparison of the checksum value and checksum data. In the described method embodiment, the data access control metadata comprises encrypted metadata corresponding to a data storage parameter, where data is stored within the tape data storage medium... |
| Using md4 checksum as primary keys to link transactions across machines | 20070271216 | 20071122 |
| A method, system, and computer instructions for using MD4 checksum to link transactions across machines. Transaction information is received, wherein transaction information comprises a checksum and topology information, and wherein the checksum serves as a unique identifier of the current transaction. A first data structure is populated with the checksum and attribute information for the current transaction. A second data structure is then populated with the checksum and topology information for the current transaction, wherein populating the second table preserves a root/parent/current transaction relationship. Preserving the root/parent/current transaction relationship allows for automatically linking a transaction to its related transactions when the transaction is uploaded from a client to a transaction database.
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| Methods and systems for enhancing local repair in robust header compression | 20070258458 | 20071108 |
| Methods and systems to enhance local repair in robust header compression (RoHC) decompressors (110, 114), which may improve network transmission efficiency and quality. One method uses lower layer information to enhance local repair at the decompressor (110, 114). Another method uses a user datagram protocol (UDP) checksum to enhance local repair at the decompressor (110, 114).
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| Non-signature malware detection system and method for mobile platforms | 20070240221 | 20071011 |
| A system and method for detecting malware on a mobile platform in a mobile network. The system and method verifies that an executable is malware-free by computing the checksum of the executable and comparing that checksum with a checksum obtained from a malware-free copy of the executable. The checksum is a sum of all 32-bit values in a code section and an import section of said executable, a byte sequence at an entry point in said executable, a size descriptor of an import table, a size descriptor of said import section, a cyclic redundancy check of said executable, or a combination thereof.
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| Method and apparatus for detecting the presence of errors in data transmitted between components in a data storage system using an i2c protocol | 20070234136 | 20071004 |
| A data storage system includes a storage processor that is configured to perform load and store operations on a storage array on behalf of external devices. The data storage system also includes a controller that isolates communication between the external devices when coupled to the storage array via the storage processor. The controller further maintains a set of registers that store information associated with the data storage system and allows the storage processor to access the register via an I2C bus. The system utilizes an error detection procedure to allow detection of errors in the data transmitted between the controller and the storage processor. During operation, a checksum value is transmitted between the controller and the storage processor using the I2C bus during a register write... |
| Method and system for depositing digital works, a corresponding computer program, and a corresponding computer-readable storage medium | 20070226507 | 20070927 |
| A method and a system for depositing digital works and a corresponding computer program and a corresponding computer-readable storage medium are disclosed, which can be used for depositing digital works under the auspices of an attorney or notary via an encrypted communication link in the Internet. According to the disclosed method, a checksum of the digital work is generated and/or the digital work is provided with a timestamp, optionally by a service provider for a fee. The checksum and/or the digital work signed with a timestamp is registered in an identification document and the identification document is certified and deposited. Preferably, the identification document is certified by a notary, by an attorney or by an institution.
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| Validating data using processor instructions | 20070226580 | 20070927 |
| In one embodiment, the present invention includes a method for determining from a data block in a buffer a number of first operands in a first portion of the buffer and a number of second operands in a second portion of the buffer. Based on these numbers, a cyclic redundancy checksum (CRC) operation may be iteratively performed on the first and second operands to obtain a checksum result. The first and second operands are of a different length, and the checksum operation may be executed using processor instructions corresponding to the different lengths. Other embodiments are described and claimed.
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| System and method for delivering targeted data to a subscriber base via a computer network | 20070219991 | 20070920 |
| A system and method for providing a user with a customized data based on the user profile. A system comprises a server that collects electronic data based on the user profile. The server then generates a checksum of the collected data and sends it to the user. Based on the checksum, the user notifies the server of the data that has been previously sent. In response, the server sends to the user data that has not been previously sent to the user.
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| Apparatus, and associated method, for forming, and operating upon, multiple-checksum-protected data packet | 20070206637 | 20070906 |
| Apparatus, and an associated method, for forming a UDP-Lite, or other, data packet with multiple, dynamically-selected, checksum-protected parts. Digitized data is provided to a formatter, and the formatter forms the data packet to include header fields identifying parts of the payload portion of the data packet that are checksum-protected with different checksums. Additional indicia is contained in the header part of the data packet to identify the checksum-type and the checksum-values associated with the separate parts of the data packet. Multiple, contiguous parts of the data packet are checksum-protected with selectable checksum-types, selected by a selector that operates to control operation of the formatter.
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| Device information managements systems and methods | 20070208929 | 20070906 |
| A device information management system comprises an application device and a BIOS ROM. The BIOS ROM comprises at least one specific region storing device information for the application device. The specific region is not used by a BIOS and not within a calculation range for checksum calculation. The BIOS ROM further comprises an index recording an address of the specific region. The application device reads the index from the BIOS ROM, and reads the device information from the specific region according to the index.
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| Method and system for locating packet boundaries | 20070195822 | 20070823 |
| A method and system for locating packet boundaries in a bit stream. The method comprises generating a checksum from a first bit stream, and recovering the first bit stream according an intermediate result which is generated during the checksum processing. The step of generating the checksum comprises dividing the first bit stream by a first polynomial to obtain a second bit stream, delaying the second bit stream by a first delay amount to form a third bit stream, multiplying the third bit stream by a second polynomial to obtain a fourth bit stream, adding the second and fourth bit streams to form a fifth bit stream, and correlating the fifth bit stream with a preset pattern to output a sync signal. The input bit stream can... |
| Method and system for repairing partially damaged blocks | 20070198889 | 20070823 |
| A method for reconstructing a logical block, wherein the logical block comprises a first set of sectors. The method including obtaining a copy of the logical block comprising a second set of sectors, determining which of the sectors in the first set of sectors are identical to sectors in the second set of sectors to obtain identical sectors, selecting a first combination of non-identical sectors from the first set of sectors and the second set of sectors, combining a copy of each of the identical sectors with the first combination of non-identical sectors to obtain a first reconstructed logical block, calculating a first checksum for the first reconstructed logical block, and determining whether the first calculated checksum is equal to the stored checksum associated with the... |
| Method and apparatus for facilitating efficient authenticated encryption | 20070189524 | 20070816 |
| A shared-key encryption scheme that uses identically keyed block-cipher calls, low additional overhead, supports the encryption of arbitrary-length strings, produces a minimal-length-ciphertext, and is fully parallelizable. In one embodiment, “OCB”, a key shared between communicating parties is mapped to a key variant using the block cipher. The key variant is mapped into a sequence of basis offsets using shifts and conditional xors. To encrypt a message using a nonce, a nonce-dependent base offset is formed, and then a sequence of offsets is constructed by starting with the base offset and then xoring, for each offset, an appropriate basis offset. The message is partitioned into message blocks of the same length as the block length of the block cipher, along with a message fragment that may be... |
| Computer platform embedded operating system backup switching handling method and system | 20070174689 | 20070726 |
| A computer platform embedded operating system backup switching handling method and system is proposed, which is designed for use with a computer platform for providing an embedded operating system backup switching handling function, and which is characterized by the provision of an operating system health status flag for indicating whether the embedded operating system code has been previously successfully loaded, such that the next time the computer platform is started, the operating system health status flag can be checked to see if the embedded operating system code is corrupted; if YES, a backup copy of operating system code is used for booting. This feature allows the computer platform to more quickly judge whether the embedded operating system code is corrupted, without having to use the more... |
| Computer program automatic recovery activation control method and system | 20070174704 | 20070726 |
| A computer program automatic recovery activation control method and system is proposed, which is designed for use with a computer platform for providing the computer platform with an automatic recovery activation control function; and which is characterized by the capability of tracking the total number of failed startup procedures the computer platform has previously experienced, such that when the total failed startup count has reached a preset upper limit (such as 3), a recovery procedure is automatically at the next startup of the computer platform. This feature allows a corrupted startup control program to be automatically recovered entirely via program control without having to involve human intervention and occupy extra motherboard layout space, and also allows the recovery procedure to be activated in the event that... |
| Device and method capable of verifying program operation of non-volatile memory and method card including the same | 20070168793 | 20070719 |
| A method of verifying programming of an integrated circuit card includes transferring program data to a page buffer of a non-volatile memory, copying the program data to a buffer memory, calculating a first checksum value with respect to program data in the buffer memory, updating the program data in the buffer memory by copying the program data of the page buffer to the buffer memory, calculating a second checksum value with respect to updated program data in the buffer memory, comparing the first checksum value and the second checksum value, and determining, based on the comparison result, whether the program data of the page buffer is tampered.
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| Device supporting mobile internet protocol version 6 (mobile ipv6) | 20070160064 | 20070712 |
| A device supporting Mobile Internet Protocol version 6 (IPv6) includes: a mobile reception processor outputting home addresses of a mobile node and a correspondent node or mobility relevant header information according to whether a received packet is a Binding packet or a data packet; a binding cache storing Binding information that the mobile node has received; a binding update list storing Binding information that the mobile node has transmitted; a binding receiver receiving a Binding message that the correspondent node has created, receiving information on the home addresses of the mobile node and the correspondent node from the mobile reception processor, and providing information related to the Binding message to the binding cache and the binding update list; a binding transmitter receiving a request for creation... |
| Communications channel interposer, method and program product for verifying integrity of untrusted subsystem responses to a request | 20070162621 | 20070712 |
| In a communications channel coupled to multiple duplicated subsystems, a method, interposer and program product are provided for verifying integrity of subsystem responses. Within the communications channel, a first checksum is calculated with receipt of a first response from a first subsystem responsive to a common request, and a second checksum is calculated for a second response of a second subsystem received responsive to the common request. The first checksum and the second checksum are compared, and if matching, only one of the first response and the second response is forwarded from the communications channel as the response to the common request, with the other of the first response and the second response being discarded by the communications channel.
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| Checksum generation apparatus and method thereof | 20070162820 | 20070712 |
| A checksum generation apparatus and method thereof. The checksum generation apparatus includes a control unit which, in response to information on a predetermined length, outputs a control signal when an amount of data corresponding to the predetermined length is received; an addition unit which receives data, performs an addition on the received data, and, in response to the control signal, outputs an addition result; and a conversion unit which converts the addition result to a checksum.
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| Method for reducing traffic loading in an ad-hoc network | 20070147252 | 20070628 |
| Disclosed is a method in a multi-hop network node for reducing data traffic loading comprising the steps of storing (204) a first communication portion, of a plurality of communication portions, received at a network node in a network node memory. Then generating (206) a first communication portion checksum and forwarding (208) the first communication portion to a destination from the network node. The method in the network node also comprises storing (210) the first communication portion checksum in a table of the network node. Then receiving (302) a second communication portion and determining the second communication portion checksum. Then determining (304) that the first communication portion checksum and the second communication portion checksum are the same and determining (310) that at least one more communications portion... |
| Content publication | 20070150596 | 20070628 |
| Publishing content using a peer-to-peer content distribution system is described. A publisher is required to request authorization to publish from an authorization body. Resources such as tracker and seed nodes are allocated in a peer-to-peer content distribution system and pre-processing of content to be published is carried out. For example, a content description is generated for each item of content as well as a set of checksums or other items for validating blocks of content. Publication can be terminated in a variety of different ways. For example, by using expiry methods, by active revocation of publishers, authorization bodies, or individual items of content.
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| Performing a cyclic redundancy checksum operation responsive to a user-level instruction | 20070150795 | 20070628 |
| In one embodiment, the present invention includes a method for receiving incoming data in a processor and performing a checksum operation on the incoming data in the processor pursuant to a user-level instruction for the checksum operation. For example, a cyclic redundancy checksum may be computed in the processor itself responsive to the user-level instruction. Other embodiments are described and claimed.
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| Auditable authentication of event histories for shipped and stored objects | 20060293977 | 20061228 |
| This invention relates to a method and system for auditably authenticating the histories of events (e.g. temperature levels) experienced by objects (e.g. pharmaceutical products, foodstuffs, etc.) during storage in repositories such as warehouses and movable shipping vehicles. The method involves a) sensing an event experienced by an object; b) recording an event signal that defines the sensed event; c) transmitting a temporally ordered series of said event signals to a data storage apparatus, said data storage apparatus being operable to store said temporally ordered series of said event signals; and d) safeguarding the aforesaid data storage apparatus against alteration of said stored series of event signals. The safeguarding may be done by selecting a data storage apparatus which is unalterable, such as a write-once-only CD-R disc.... |
| Method and apparatus for facilitating efficient authenticated encryption | 20060285684 | 20061221 |
| A shared-key encryption scheme that uses identically keyed block-cipher calls, low additional overhead, supports the encryption of arbitrary-length strings, produces a minimal-length-ciphertext, and is fully parallelizable. In one embodiment, “OCB”, a key shared between communicating parties is mapped to a key variant using the block cipher. The key variant is mapped into a sequence of basis offsets using shifts and conditional xors. To encrypt a message using a nonce, a nonce-dependent base offset is formed, and then a sequence of offsets is constructed by starting with the base offset and then xoring, for each offset, an appropriate basis offset. The message is partitioned into message blocks of the same length as the block length of the block cipher, along with a message fragment that may be... |
| Identifying an operating system associated with a boot path | 20060288197 | 20061221 |
| Various characteristics of a hard drive may be analyzed in order to determine the nature of an operating system stored thereon. For example, an operating system indicator and/or a boot record may be identified which may enable operating system identification. Alternatively, checksums may be used to disambiguate the stored operating system. Other disk characteristics may be utilized to enable a determination of operating system and operating system version. This information may be provided to the user in a graphical user interface indicating the correspondence between operating systems and drives, or a desired operating system, once identified, may be automatically used without analyzing all drives.
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| Computer-implemented method with real-time response mechanism for detecting viruses in data transfer on a stream basis | 20060288418 | 20061221 |
| A computer-implemented and stream-based virus-detecting method which inspects packets for malicious contents in a network system scans each incoming packet forming input data for virus code. Depending on packet type, when a packet contains virus code, the method either removes the virus code, replaces a segment previously occupied by the virus code with information indicating the existence of the virus code and creates a modified packet by reconstructing a header and a checksum of the packet, or removes the virus without creating a modified packet, or withholds a last packet from reaching its destination address.
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| Method to secure credit card information stored electronically | 20060282372 | 20061214 |
| A method by which merchants who store sensitive credit card information can secure the information from theft, while minimizing the impact on the customer, as well as minimizing the cost of implementation. The merchant uses a special secured record for the storage of the credit card information for a specific customer. The record consists of two parts. The first part of the record contains public information which is visible to anyone with access to the record. The public information includes the merchant identity, along with information that constrains the use of the record, such as limits on the type of purchase, amount of purchase, or frequency of purchase, as well as the expiration date of the record, approved shipping addresses, and other constraints that make the... |
| Methods for using checksums in x-tolerant test response compaction in scan-based testing of integrated circuits | 20060282728 | 20061214 |
| Methods for designing and using checksums in X-tolerant test response compaction in scan-based testing of integrated circuits. Flip-flops of a chip are treated as points of a discrete geometrical structure described in terms of points and lines (e.g., a two-dimensional structure, or the like). Each point represents a MUXed flip-flop holding a value. Each line (with points on it) represents a checksum: bit values of flip-flops corresponding to points on the line are all XORed together. A set of all checksums (“lines”) may be separated into subsets, where each subset contains parallel lines. One of these subsets (such that each point belongs to one of lines of the subset) represents scan chains, each line representing one scan chain. In a preferred embodiment, a compactor contains separate... |
| Apparatus and methods for a high performance hardware network protocol processing engine | 20060274789 | 20061207 |
| Certain embodiments of the invention may be found in a method for a high performance hardware network protocol processing engine. The method may comprise processing TCP packets via a plurality of pipelined hardware stages on a single network chip. Headers of received TCP packets may be parsed, and Ethernet frame CRC digests, IP checksums and TCP checksums may be validated, at a first stage of the parallel, pipelined hardware stages. IP addresses of the TCP packets that are received may also be validated at the first stage. TCB index of the TCP packets that are received may be looked up at a second stage. TCB data for TCP packets may be looked up at a third stage and receive processing of the TCP packets may be... |
| Encoding and application of extended hamming checksum | 20060265633 | 20061123 |
| A method for calculating an extended hamming checksum and applying the extended hamming checksum to a data packet, the method comprising forming a packet extended hamming checksum mask, calculating a hamming code, calculating an extended hamming checksum using the packet extended hamming checksum mask and the hamming code, and inserting the extended hamming checksum into the data packet.
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| Method and apparatus for keeping information in routing tables consistent throughout wireless network | 20060256769 | 20061116 |
| A method and apparatus for keeping information included in routing tables consistent throughout a wireless network are provided. The method includes enabling a mesh access point to generate data and transmit the data, gathering a plurality of pieces of information about a plurality of stations associated with the mesh access point, classifying the plurality of pieces of information into a plurality of blocks, generating a checksum for each of the blocks, and transmitting the checksum.
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| Time synchronization, deterministic data delivery and redundancy for cascaded nodes on full duplex ethernet networks | 20060245454 | 20061102 |
| A method and circuit for precisely synchronizing clocks in separate nodes on a communication network is provided by adjusting timestamps and related data in network messages. The circuit will allow a daisy-chain connection of the nodes and will forward time synchronization frames while accounting for delays in a manner that does not use boundary clocks, but does not depart from the IEEE 1588 standard protocol. The delays will be added on the fly to synchronization packets and the IP checksum and frame CRC will be adjusted. Deterministic data delivery and redundant data paths are also provided in a full duplex Ethernet network.
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| Methods and apparatus using commutative error detection values for fault isolation in multiple node computers | 20060248370 | 20061102 |
| The present invention concerns methods and apparatus for performing fault isolation in multiple node computing systems using commutative error detection values—for example, checksums—to identify and to isolate faulty nodes. In the present invention nodes forming the multiple node computing system are networked together and during program execution communicate with one another by transmitting information through the network. When information associated with a reproducible portion of a computer program is injected into the network by a node, a commutative error detection value is calculated and stored in commutative error detection apparatus associated with the node. At intervals, node fault detection apparatus associated with the multiple node computer system retrieve commutative error detection values saved in the commutative error detection apparatus associated with the node and stores them... |
| Method and apparatus for canceling interference from high power, high data rate signals | 20060240794 | 20061026 |
| A method and apparatus in a radio receiver for canceling interference from a high power, high data rate signal received in a combined signal that includes a contribution from the high power signal and a contribution from a lower power signal. It is first determined whether the high power signal was correctly received. A CRC checksum may be used to determine whether the high power signal was received with a good reliability. Thereafter, the contribution of the high power signal is removed from the received signal only if the high power signal was correctly received. The contribution of the high power signal may be removed by hard-subtracting the contribution of the high power signal from the received signal if all of the bits of the checksum... |
| Data security in a mobile e-mail service | 20060240804 | 20061026 |
| A method for conveying e-mail traffic between an e-mail server (108) and a mobile terminal (102) which has an e-mail address (122A) under the e-mail server and permanent terminal identity (122B) and a temporary identity (122D) in an access network (114). A connectivity function (600) is operationally coupled to the e-mail server (108) and the access network (114). The connectivity function (120) encrypts e-mail traffic to the mobile terminal and decrypt e-mail traffic from the mobile terminal, by using encryption information (122C). The mobile terminal generates (2-1) a service activation code which comprises an identifier (124D) of the mobile terminal, encryption information (122C) and checksum information. The service activation code is conveyed (2-3, 2-4) via a secure channel (2-3) to an authenticating terminal (100), from which... |
| Enhancements to data integrity verification mechanism | 20060242513 | 20061026 |
| A method and apparatus is provided for maintaining data integrity. According to the method, a physical checksum calculation is performed on a block of data. After performing the physical checksum calculation, a logical check is performed on the data contained with the block of data. If the block of data passes the logical check, then the block of data may be written to nonvolatile memory. Thereafter, when the block of data is read from nonvolatile memory a physical checksum verification procedure is performed on the block of data to determine whether the block of data was corrupted after performing the logical check on the data contained with the block of data.
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| Policy based auditing of workflows | 20060235964 | 20061019 |
| An auditing system is disclosed comprising a Policy Validation Mechanism Program (PVMP) that operates in conjunction with a Workflow Engine (WE), and a Policy Validation Server Program (PVSP) that operates on a Policy Validation Server (PVS) connected to the WE by a secure communication link. The PVMP converts a workflow to a workflow representation (WR) and sends the WR to the PVS. The PVSP compares the steps in the WR to a security policy identified for that WR and determines whether the WR is in compliance. In addition, the PVSP validates a checksum for the WR and logs the checksum for subsequent comparisons. The PVSP uses the checksum to determine whether a policy has changed during execution of the workflow. If the WR is not in... |
| Method and apparatus for template based parallel checkpointing | 20060236152 | 20061019 |
| A method and apparatus for a template based parallel checkpoint save for a massively parallel super computer system using a parallel checksum algorithm such as rsync. In preferred embodiments, the checkpoint data for each node is compared to a template checkpoint file that resides in the storage and that was previously produced. Embodiments herein greatly decrease the amount of data that must be transmitted and stored for faster checkpointing and increased efficiency of the computer system. Embodiments are directed a parallel computer system with nodes arranged in a cluster with a high speed interconnect that can perform broadcast communication. The checkpoint contains a set of actual small data blocks with their corresponding checksums from all nodes in the system. The data blocks may be compressed using... |
| Apparatuses and methods for checking integrity of transmission data | 20060236199 | 20061019 |
| A generator may include a monitoring unit, an engine unit and/or a register. The monitoring unit may selectively extract at least a portion of data to be transmitted to, or received from, an external communication device. The engine unit may generate an error check code using a polynomial expression or a checksum according to a transmission format associated with the extracted data. The register may store the generated error check code.
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| Image processor | 20060236200 | 20061019 |
| An image processor includes a JPEG 2000 codec. The JPEG 2000 codec generates a plurality of levels of encoded data, and a checksum circuit integrates the encoded data for each of the levels to determine a checksum. The determined checksum is written together with the encoded data into a header of a stream. In decoding a desired level of the encoded data, a checksum is determined again on the basis of the encoded data and compared with the checksum written in the header. Accordingly, if the two matches with each other, it is concluded that the encoded data is not tampered. If the two does not match with each other, it is concluded that the encoded data is tampered and a warning message is displayed on... |
| Tcp engine | 20060227811 | 20061012 |
| A network transport layer accelerator accelerates processing of packets so that packets can be forwarded at wire-speed. To accelerate processing of packets, the accelerator performs pre-processing on a network transport layer header encapsulated in a packet for a connection and performs in-line network transport layer checksum insertion prior to transmitting a packet. A timer unit in the accelerator schedules processing of the received packets. The accelerator also includes a free pool allocator which manages buffers for storing the received packets and a packet order unit which synchronizes processing of received packets for a same connection.
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| Electronic balance checking and credit approval system for use in conducting electronic transactions | 20060229978 | 20061012 |
| An electronic balance checking and credit approval system includes consumer transaction accounts, tokens, input devices, authentication hardware and software, and output devices. The consumer transaction account is held in trust on behalf of a consumer by a credit extending company. The token is specific to and held by the consumer, and includes a consumer account identifier that is associated with the consumer transaction account. The input device receives the consumer account identifier concurrent with a consumer-initiated request for account balance information. The authentication hardware and software verifies the consumer-initiated request and the consumer account identifier and authorizes access to the consumer transaction account. The consumer interface apparatus provides the consumer with a real-time account balance datum that is currently associated with the consumer transaction account. The... |
| Issuing machine and issuing system | 20060229979 | 20061012 |
| An issuing system for issuing unmodifiable and/or unforgeable hardcopy documents or securities includes a server and a plurality of issuing machines connected to the server via a network. Each of the issuing machines receives an ID recording medium provided by a potential purchaser, retrieves an identification recoded in the received ID recording medium, requests the potential purchaser to input request for a transaction of the security or fixed rate financing instrument, processes the requested transaction by retrieving information via a network from the server, and prints out on demand a hardcopy of the security or fixed rate financing instrument as purchased by the potential purchaser and a checksum thereon. A method for forming a new market with the issuing system.
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| System and method for parsing, filtering, and computing the checksum in a host ethernet adapter (hea) | 20060221952 | 20061005 |
| A system and method for parsing, filtering, and computing the checksum in a host Ethernet adapter (HEA) that is coupled to a host. The method includes receiving a part of a frame, wherein a plurality of parts of a frame constitute a entire frame. Next, parse the part of a frame before receiving the entire frame. The HEA computes a checksum of the part of a frame. The HEA filters the part of a frame based on a logical, port-specific policy and transmits the checksum to the host.
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| Method and apparatus for blind checksum and correction for network transmissions | 20060221953 | 20061005 |
| Method and apparatus for providing a checksum in a network transmission. In one aspect of the invention, a checksum for a packet to be transmitted on a network is determined by retrieving packet information from a storage device, the packet information to be included in the packet to be transmitted. A blind checksum value is determined based on the retrieved packet information, and the blind checksum value is adjusted to a protocol checksum based on descriptor information describing the structure of the packet. The protocol checksum is inserted in the packet before the packet is transmitted.
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| System and method for computing a blind checksum in a host ethernet adapter (hea) | 20060221969 | 20061005 |
| A system and method for computing a blind checksum includes a host Ethernet adapter (HEA) with a system for receiving a packet. The system determines whether or not the packet is in Internet protocol version four (IPv4). If the packet is not in IPv4, the system computes the checksum of the packet. If the packet is in IPv4, the system determines whether the packet is in transmission control protocol (TCP) or user datagram protocol (UDP). If the packet is not in either of TCP or UDP the system attaches a pseudo-header to the packet and computes the checksum of the packet based on the pseudo-header and the IPv4 standard.
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| System and method for detection of mobile handset software corruption | 20060223496 | 20061005 |
| A system and method for detecting wireless telecommunications mobile handset software corruption is provided. The method includes retrieving stored configuration data and stored checksum for a mobile handset stored on a wireless telecommunications network element, determining an actual checksum from the mobile handset, comparing the actual mobile handset checksum with the stored checksum retrieved from the network element, and detecting a mobile handset software corruption. Uncorrupted software can then be downloaded to the mobile handset thereby repairing the software corruption.
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| Method and system for accessing and launching a java based applet as a locally installed application | 20060225058 | 20061005 |
| A method for launching an interface with a remotely located electronic device. Specifically, a loader that is locally installed is launched. The loader is associated with an embedded application stored on a remote device. Communication is established with the remote device to access a first checksum value that is stored on the remote device. Thereafter, the first checksum value is compared against a second checksum value of a locally stored version of the embedded application. The locally stored version of the embedded application is launched when the first check value matches the second checksum value.
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| Electronic message system with federation of trusted senders | 20060212520 | 20060921 |
| Systems and methods for allowing challenge messages to be sent directly to a recipient's inbox where normally the challenge message would be sent to a pending folder or deleted. Challenge messages sent between federated messaging services contain a federated token which can be identified, authenticated and validated to determine whether the challenge message should be sent to a recipient's inbox. The federated token can include an authentication portion and a validation portion. Authentication methods for the authentication portion can include, for example, checksums, salts, hashes and digital signatures. Once a federated token is authenticated by decrypting the authentication portion according to one or more of these authentication methods, the federated token is validated by determining the defined use-base and determining whether the receipt of the federated... |
| Storing and retrieving computer data files using an encrypted network drive file system | 20060206547 | 20060914 |
| A system and method for storing computer files in a destination file is described, which may be an incremental backup system. File headers related to the files may be stored in a file index separate from a data file, or subsequent versions may be stored in the same data file while maintaining earlier versions. File headers may include locations of files, checksums, metadata about individual blocks corresponding to the data files. A system may include a client application program stored on a client computer, a network, and a server software program on a destination computer. Embodiments may include compression, encryption, or both, performed by the client application program. Files may be divided into blocks, and metadata may include locations of blocks. Files may be restored from... |
| Method and apparatus for calculating checksums | 20060195759 | 20060831 |
| A method for calculating checksums includes calculating a first checksum based at least in part on a first block of data, and calculating a partial checksum based at least in part on a second block of data. The second block of data comprises a data portion followed by a fill portion, the fill portion having a length equal to a length of the first block of data. The first checksum and partial checksum are combined to form a second checksum for a total block of data, the total block of data comprising the first block of data and the data portion of the second block of data.
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| Creating an ip checksum in a pipeline architecture with packet modification | 20060187965 | 20060824 |
| A network device for processing data on a data network includes a port interface, connected to a plurality of ports configured to receive a data packet from a data network and to send a processed data packet to the data network and a parser, in communication with the port interface, configured to parse the received data packet and modify the received packet to produce the processed data packet. The parser is configured to set a flag for portions of the data packet to be changed, determine a pseudo-checksum from the portions for which the flag has not been set and provide a new checksum for the processed data packet using the pseudo-checksum.
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