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| Number | Title | Issue Date |
| 8045707 | System and method for securing data Systems and systems that protect data are provided. In one embodiment, a system may include, for example, a memory and a processor. The memory may store, for example, encrypted data. The processor may be coupled to the memory and may include, for example, a decrypto... | 10/25/2011 |
| 7961878 | Imparting cryptographic information in network communications This specification describes technologies relating to imparting cryptographic information in network communications. In general, aspects of the subject matter described in this specification can be embodied in methods that include identifying a location in a pre-def... | 06/14/2011 |
| 7912215 | Data transmission apparatus, data receiving apparatus and method executed thereof A data transmitting apparatus generates, by using predetermined first key information and information data, a multi-level signal in which a signal level changes so as to be approximately random numbers, and converts the multi-level signal into a modulated signal, in... | 03/22/2011 |
| 7889861 | Multiple sequential security key encryption-decryption A method for reducing the memory requirements of executing ciphering processes is disclosed which utilizes sequential key extraction and ciphering. By providing a base key for extracting therefrom multiple first sequential security keys; each key is sequentially ext... | 02/15/2011 |
| 7840002 | Techniques to strengthen one-time pad encryption Apparati, methods, and computer-readable media for strengthening a one-time pad encryption system. A method embodiment of the present invention comprises the steps of encrypting plaintext (1) with an OTP key (2) in an XOR operation to produce ciphertex... | 11/23/2010 |
| 7756270 | Encryption device and decryption device An apparatus for enciphering data by which enciphered digital information data with improved cipher strength are obtained by subjecting digital information data to enciphered process responding to random number data or pseudo-random number data produced in accordanc... | 07/13/2010 |
| 7587045 | System and method for securing document transmittal The present invention is directed to a system and method for secure transmission of electronic document data on a network. The method begins with the receipt of user identification data associated with the identity of a user of document processing devices on the ass... | 09/08/2009 |
| 7519177 | Method and system for processing a data set A method and system for processing a data set. More particularly, the present invention provides a method and system for encrypting or decrypting a data set so that the data set remains entirely in the ASCII printable range. The method and system of the present inve... | 04/14/2009 |
| 7457410 | Transmission/reception system A server and a client hold common secret information in respective secret information holding units. A server Cyclic Redundancy Check (CRC) unit in the server generates a CRC code after adding the secret information to communication data, and transmits the communica... | 11/25/2008 |
| 7428306 | Encryption apparatus and method for providing an encrypted file system An encryption apparatus and method for providing an encrypted file system are provided. The encryption apparatus and method of the illustrative embodiments uses a combination of encryption methodologies so as to reduce the amount of decryption and re-encryption that... | 09/23/2008 |
| 7421075 | Wireless online cryptographic key generation method A system and method for wireless cryptographic key exchange among participants in a wireless computing network is presented. This allows the authorized participants in the wireless communication session not have the same key before the wireless computing session beg... | 09/02/2008 |
| 7412061 | Encrypting a digital object on a key ID selected therefor To encrypt a digital object, a key ID is selected for the digital object, and a function ƒ( ) having an input and an output is selected. The selected key ID is then employed as the input to the function ƒ( ), and the output of such function ƒ( ) is employed as th... | 08/12/2008 |
| 7412058 | Digital receiver and method for receiving secure group data A method and radio receiver are provided for receiving and deciphering RF signals having encrypted data information relevant to the receiver environment. According to one aspect of the present invention, the receiver includes an input for receiving an RF signal havi... | 08/12/2008 |
| 7400723 | Secure method for secret key cryptographic calculation and component using said method A secured method of cryptographic computation to generate output data from input data and from a secret key includes a derived key scheduling step to provide a derived key from the secret key according to a known key scheduling operation. The method also includes a ... | 07/15/2008 |
| 7386124 | Block encoding method and block encoding/decoding circuit A block cipher method eliminates the overhead associated with key scheduling, decreases the required time for encryption or decryption, and increases the total throughput. A key scheduling circuit (12) for generating round key data from key data for the encry... | 06/10/2008 |
| 7382820 | Spread spectrum modulation system and method for embedding digital information into digital or analog media A system and method for embedding information into digital media and later detecting the embedded information using a unique spread spectrum modulation technique. In general, the present invention removes interference caused by an original signal from the detection ... | 06/03/2008 |
| 7380132 | Data recording method and apparatus, data record medium and data reproducing method and apparatus An input is ciphered in at least one of a sector forming circuit 13, a scrambling circuit 14, a header appendage circuit 15, an error correction encoding circuit 16, a modulation circuit 17 and a synchronization appendage circuit | 05/27/2008 |
| 7370212 | Issuing a publisher use license off-line in a digital rights management (DRM) system A publishing user publishes digital content and issues to itself a corresponding digital publisher license to allow itself to render the published digital content. The publishing user is supplied with a publishing certificate from a digital rights management (DRM) s... | 05/06/2008 |
| 7369635 | Rapid discrimination preambles and methods for using the same A system, method and program are disclosed for achieving rapid bit synchronization in low power medical device systems. Messages are transmitted via telemetry between a medical device and a communication device. The synchronization scheme uses a portion of a unique ... | 05/06/2008 |
| 7366299 | Method for encrypting and decrypting data using derivative equations and factors A data cryptographer encrypts and decrypts character data of any given length using derivative equations and factors. The use of factors and derivative equations introduces the randomness required for effective encryption without the use of complex mathematics. A se... | 04/29/2008 |
| 7362859 | Enhancement of utilization of encryption engine A method of enhancing throughput of a pipelined encryption/decryption engine for an encryption/decryption process has a predetermined number of stages and provides feedback around the stages (and of such an encryption/decryption engine) by receiving a source datablo... | 04/22/2008 |
| 7358767 | Efficient multiplexer for programmable chips Methods and apparatus are provided for implementing efficient multiplexers on a programmable chip using a lookup table. A load logic input line associated with a lookup table having limited input lines is used to augment the number of input lines that can be handled... | 04/15/2008 |
| 7358760 | Efficient 4:1 multiplexer for programmable chips Methods and apparatus are provided for implementing efficient multiplexers on a programmable chip using a lookup table (LUT). A load logic input line associated with a LUT having limited input lines is used to augment the number of input lines that can be handled by... | 04/15/2008 |
| 7359391 | Multi-port network interface circuit and related method for scrambling codes of different ports with different seeds and resetting signal transmission of different ports at different times A multi-port network interface circuit and related control method. The network interface circuit has a plurality of PHY circuits, each of the PHY circuit is used for transmitting signals to a plurality of corresponding network nodes via different ports. Each of the ... | 04/15/2008 |
| 7356148 | Information processing method and apparatus, computer program, and computer-readable storage medium Image data encoded in units of a tile is processed to define a hierarchical structure by repeatedly forming one tile group from adjacent tiles and another tile group from adjacent tile groups. Plural partially encoded data a tile located at a terminal of the hierarc... | 04/08/2008 |
| 7356149 | Information processing method and apparatus, computer program, and computer-readable storage medium An object of this invention is to eliminate the necessity to manage a plurality of keys even when image data having a plurality of tiles and layers is encrypted using different encryption keys for the respective tiles and layers. For this purpose, in this invention,... | 04/08/2008 |
| 7353209 | Releasing decrypted digital content to an authenticated path Digital content is released to a rendering application for forwarding by such rendering application to an ultimate destination by way of a path therebetween. The path is defined by at least one module, and the digital content is initially in an encrypted form. An au... | 04/01/2008 |
| 7350069 | System and method which employs a multi user secure scheme utilizing shared keys We propose a multi user information theoretically secure scheme. Our scheme allows any two parties in a multi user system to exchange messages securely using encryption, and to sign messages. Our scheme achieves a significant saving in the number of total keys in th... | 03/25/2008 |
| 7343496 | Secure transaction microcontroller with secure boot loader A high security microcontroller (such as in a point of sale terminal) includes tamper control circuitry for detecting vulnerability conditions: a write to program memory before the sensitive financial information has been erased, a tamper detect condition, the enabl... | 03/11/2008 |
| 7340606 | Digital certificates A method for producing a certificate, the certificate including data, the method including choosing a seed s, the seed s including a result of applying a function H to the data, generating a key pair (E,D), such that E=F(s,t), F being a publicly known function, and ... | 03/04/2008 |
| 7340603 | Efficient revocation of receivers Methods and apparatus for efficient revocation of receivers. In one implementation, a method of broadcast encryption includes: assigning a respective master key to each of a plurality of receivers, where each master key can be used to derive two or more of a plurali... | 03/04/2008 |
| 7337464 | Set-top box reformatter A broadcasting system including a transmitter operative to transmit a signal in a first transmission format, a receiver operative to receive the signal, a reformatter operative to reformat the received signal into a second transmission format, and a set-top box (STB... | 02/26/2008 |
| 7336783 | Cryptographic systems and methods supporting multiple modes Cryptographic systems and methods that support multiple modes of operation, such as CBC, CTR and/or CCM modes. In one aspect, a method for encrypting data includes reading a plaintext data block from a memory, storing the plaintext data block in an input buffer, enc... | 02/26/2008 |
| 7333613 | Cyphering of the content of a memory external to a processor A method of cyphering, by an integrated processor, of a set of data to be stored in a memory, including performing, in a continuous operation following a data flow, the steps of dividing the data flow into blocks of predetermined size and, for each block: generating... | 02/19/2008 |
| 7327846 | Secure cryptographic key exchange and verifiable digital signature One aspect of the present invention establishes a session key by a receiving unit R transmitting a plurality of quantities for storage in a public repository. A sending unit S: 1. retrieves the plurality of quantities; and ... | 02/05/2008 |
| 7328453 | Systems and methods for the prevention of unauthorized use and manipulation of digital content A number of systems and methods, alone, or in combination, achieve various levels of protection against unauthorized modification and distribution of digital content. This encompasses at least unauthorized study, modification, monitoring, reconstruction, and any oth... | 02/05/2008 |
| 7327936 | Secured device for the processing of high-quality audiovisual works A method for distributing video sequences according to a nominal flow format including a succession of frames, each including at least one I block corresponding to a complete digital I image, each I image being broken down into blocks and macroblocks dependent on ea... | 02/05/2008 |
| 7323189 | Liquid and low melting coatings for stents A method for forming liquid coatings for medical devices such as stents and angioplasty balloons is provided. The liquid coatings can be made from biodegradable materials in liquid, low melting solid, or wax forms, which preferably degrade in the body without produc... | 01/29/2008 |
| 7325115 | Encryption of system paging file An operating system copies data from memory pages into a paging file on disk, in order to free up space in the memory. A mechanism is disclosed that causes the data to be encrypted as it is copied into the paging file, thereby protecting the paged data from unauthor... | 01/29/2008 |
| 7321659 | Simple universal hash for plaintext aware encryption 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 check... | 01/22/2008 |
