The invention provides a method and system for creating an innovative file system that separates its directory presentation from its data store. The method and system include processing, division, distribution, managing, synchronizing, and reassembling of file system objects that does not delay the presentation of the content to the user, but also uses a reduced amount of storage space. The invention includes the ability to manage and control the integrity of the files distributed across the network, and the ability to serve and reconstruct files in real time using a Virtual File Control System.

Method and system for managing distributed content and related metadata

A high availability, high reliability storage system (215) that leverages rapid advances in commodity computing devices and the robust nature of internetwork technology such as the Internet (213). A system of parity distribution (505) in accordance with the present invention allows for greater fault tolerance and levels of storage efficiency than possible with conventional RAID (levels 0-5) paradigms. Data can be recovered or made available even in the case of loss of N, N+1, or more devices or storage elements (215) over which stripes of the data set have been distributed or partitioned. The present invention provides a parity distribution that can be used to distribute data stored in a single storage device or across multiple connected or otherwise networked devices.

System and method for data protection with multidimensional parity

The invention provides systems and methods for continuous back up of data stored on a computer network. To this end the systems of the invention include a synchronization process that replicates selected source data files data stored on the network and to create a corresponding set of replicated data files, called the target data files, that are stored on a back up server. This synchronization process builds a baseline data structure of target data files. In parallel to this synchronization process, the system includes a dynamic replication process that includes a plurality of agents, each of which monitors a portion of the source data files to detect and capture, at the byte-level, changes to the source data files. Each agent may record the changes to a respective journal file, and as the dynamic replication process detects that the journal files contain data, the journal files are transferred or copied to the back up server so that the captured changes can be written to the appropriate ones of the target data files.

Systems and methods for backing up data files

A system and method for data storage by shredding and deshredding of the data allows for various combinations of processing of the data to provide various resultant storage of the data. Data storage and retrieval functions include various combinations of data redundancy generation, data compression and decompression, data encryption and decryption, and data integrity by signature generation and verification. Data shredding is performed by shredders and data deshredding is performed by deshredders that have some implementations that allocate processing internally in the shredder and deshredder either in parallel to multiple processors or sequentially to a single processor. Other implementations use multiple processing through multi-level shredders and deshredders. Redundancy generation includes implementations using non-systematic encoding, systematic encoding, or a hybrid combination. Shredder based tag generators and deshredder based tag readers are used in some implementations to allow the deshredders to adapt to various versions of the shredders.

Data storage system and method by shredding and deshredding

A computer device and method for encoding a message corresponding to an outcome of a computer game, and a computer device and method for decoding the message to detect a fraudulent outcome. The computer device used to generate the encoded message includes (1) a memory device containing encoding control code and (2) a processor configured to process the encoding control code in conjunction with a computer game outcome to generate an encoded message containing the computer game outcome and to transmit the encoded message to a human-readable output device, such as a display device. The computer device includes various tamper resistant or tamper evidence features. A secure module containing the processor and memory is used to plug into an existing personal computer or dedicated game device. The method for encoding the message includes the steps of executing a computer game program to generate a computer game outcome, encoding the computer game outcome to generate an encoded message, and providing the encoded message to a user, who may then transmit the encoded message to a device configured for decoding the encoded message to reveal the computer game outcome. A second central or host computer device is used to decode the encoded message. The second computer device has (a) a memory device containing decoding control code and an encoded message corresponding to a computer game outcome and (b) a processor configured to process the code to decode the encoded message to reveal the computer game outcome.

Remote-auditing of computer generated outcomes and authenticated biling and access control system using cryptographic and other protocols

An information processing system providing archive/backup support with privacy assurances by encrypting data stored thereby Data generated on a source system is encrypted, the key used thereby is separately encrypted, and both the encrypted data and encrypted key are transmitted to and maintained by a data repository system The repository system receives only the encrypted data and key, while the source system retains the ability to recover the key and in turn, the data The source system is therefore assured of privacy and integrity of the archived data by retaining access control yet is relieved of the physical management of the warehousing medium

Secure file archive through encryption key management

High performance backup of a computer system includes backing up changed portions of files and selectively choosing files for backup. Files are treated as a collection of blocks, and only those blocks which have changed since a previous backup are transmitted to a backup system. Prior to selecting blocks for backup, files are selectively chosen by excluding previously archived files such as commercial software, and excluding other non-critical applications and data based on, inter alia, commonality, modification date and a list of files which are already present in the backup system. Files may also be pre-loaded into a backup system in anticipation of their presence in the computer system to be backed up.

High performance backup via selective file saving which can perform incremental backups and exclude files and uses a changed block signature list

A method for the administration of a differential file backup system in a client server system (118,102, 110) is disclosed in which the various component files that comprise a backup file (120) are read from a first memory device (106, 114) of the file backup system to a second memory device (108, 116) and processed by the server. The server processes the various file components, or archive files in which the various file components reside, to reduce the number of access points across the first memory device (106, 114) to enhance the efficiency of the file retrieval, file reconstruction, and file restore operations of the backup file system.

Administration of a differential backup system in a client-server environment

File comparison employs a single function F to calculate a digital signature from data in a sliding window. The digital signature is both incrementally computable and position sensitive. In particular, F is computable without reprocessing each byte in the array when the window is advanced and facilitates detection of such changes as transposed bytes of data. The function F is defined by two qualities. First, for F(A+B), where A is an array, F(A+B)=F(A)+F(B). Second, given a concatenation operator "!" such that "0!A" indicates an array A with 0 inserted before A, the function F has the property that there is a function G such that F(0!A)=G(F(A'0)). Both polynomials and cyclic redundancy checks ("CRC") may be used as that class of function.

File comparison for data backup and file synchronization

A method and system for protecting computer program distribution within a broadcast medium involves encrypting at least a portion of the computer program Si using an encryption scheme keyed to both an encryption key SKi and a program identifier i. Each decryption device (PCDD) also has an associated identifier j. Two tables are generated and stored in a memory device: a first table, including correlations between the encryption key SKi and the program identifier i; and a second table, including correlations between the password key PKj and the hardware identifier j. A password Pij is generated based on both the encryption key SKi and a password key PKi is retrieved from these tables. The password Pij is transmitted to the user for subsequent use in decrypting the subject software program contained on the medium.

David A. Cane

Papers

Secure file archive through encryption key management

High performance backup via selective file saving which can perform incremental backups and exclude files and uses a changed block signature list

Administration of a differential backup system in a client-server environment

File comparison for data backup and file synchronization

Software catalog encoding method and system