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| Number | Title | Issue Date |
| 8189776 | Method and system for encoding multimedia content based on secure coding schemes using stream cipher Described herein are various embodiments of a coding technique that utilize a stream cipher for switching between first and second coding conventions for encoding a symbol sequence. The first coding convention specifies a first mapping between a symbol and a first c... | 05/29/2012 |
| 8175267 | Communication apparatus, communication system, transmission method, and computer program product A communication apparatus stores encrypted pieces having plural pieces as a part of a content encrypted, and number of transmission times. At least one first piece is encrypted by plural different encryption keys. The communication apparatus selects as priority piec... | 05/08/2012 |
| 8155309 | Circuit arrangement with non-volatile memory module and method for en-/decrypting data in the non-volatile memory module An apparatus and method is provided for protecting data in a non-volatile memory by using an encryption and decryption that encrypts and decrypts the address and the data stored in the non-volatile memory using a code read only memory that stores encryption and decr... | 04/10/2012 |
| 8077868 | Mechanism for transport-safe codings for cryptographic use In one embodiment, a mechanism for transport-safe codings for cryptographic use is disclosed. In one embodiment, a method for transport-safe coding for cryptographic use includes converting an input data stream into index values associated with “n” printable cha... | 12/13/2011 |
| 8077867 | Confidential information processing apparatus, confidential information processing device, and confidential information processing method The present invention relates to a confidential information processing device, a confidential information processing apparatus, and a confidential information processing method, and particularly to a confidential information processing device which performs multiple... | 12/13/2011 |
| 7986781 | Method for controlling access to encrypted data The invention concerns a method for controlling access to encrypted data (CT) by control words (CW), said control words being received by a security module in control messages (ECM) and returned to a unit operating on the encrypted data. Said control messages (ECM) ... | 07/26/2011 |
| 7970132 | Reduced hierarchy key management system and method A controller receives an encrypted media stream (“EMS”) and an identifier indicative of a selected content key from a headend. The EMS is encrypted with an encryption key and can be decrypted with a corresponding decryption key which is determinable from the sel... | 06/28/2011 |
| 7936874 | Information transfer system, encryption device, and decryption device A content delivery system, enabling a ciphertext to be reduced in size when using the ElGamal cipher, includes a content delivery device performing elliptic curve encryption on a content key, generating an encrypted content key that includes an x coordinate of an el... | 05/03/2011 |
| 7933405 | Data access and permute unit According to embodiments of the invention, there is disclosed a data processing unit, a method of operating the same, computer program product and an instruction. In one embodiment according to the invention, there is provided a data processing unit for a computer p... | 04/26/2011 |
| 7925012 | Method and system for the secure distribution of compressed digital texts A process for the secure distribution of compressed digital texts formed by blocks of binary data stemming from digital transformations applied to an original text, and including two stages: a preparatory stage including modifying at least one binary data in one of ... | 04/12/2011 |
| 7860246 | System and method for protecting data in a secure system A system for protecting data in a security system generates and encodes a backup key for encoding long-lived secrets. The system generates a distribution plan for distributing cryptographic splits of the encoded backup key to selected persons based on geographic and... | 12/28/2010 |
| 7822198 | Parallel encryptor and decryptor An encryptor/decryptor which receives a continuous parallel data stream either in a single-ended TTL or a Low Voltage Differential Signaling format. The encryptor/decryptor selectively encrypts or decrypts the incoming data stream, using an LVDS encryptor/decryptor ... | 10/26/2010 |
| 7760874 | Method and system for implementing FI function in KASUMI algorithm for accelerating cryptography in GSM/GPRS/EDGE compliant handsets In a wireless communication system, a method and system for implementing an FI function in a KASUMI algorithm for accelerating cryptography in GSM/GPRS/EDGE compliant handsets are provided. An efficient implementation of the FI function may comprise a first substitu... | 07/20/2010 |
| 7747013 | Early detection system and method for encrypted signals within packet networks A system and method for providing early detection of encrypted signals within a secure connection for voice over Internet protocol (VoIP). The system and method includes a non-complex, in-band, and early encryption detector within the voice path. A transmitter sends... | 06/29/2010 |
| 7623656 | Stream cipher encryption and message authentication Stream cipher encryption and message authentication. Stream cipher encryption is performed by generating a keystream at the transmitting end from a state value, applying the keystream to plaintext to generate an encrypted message block having at least a portion of t... | 11/24/2009 |
| 7623657 | Methods and apparatus for secure and adaptive delivery of multimedia content Techniques for securely and adaptively delivering multimedia content. It is assumed that a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time... | 11/24/2009 |
| 7616762 | System and method for authenticating/registering network device in power line communication (PLC) A method and apparatus for protecting privacy in power line communication (PLC) networks. Data transmitted on a PLC network is encrypted according to a network key and can be properly received only by registered devices that have the proper network ID and network ke... | 11/10/2009 |
| 7606364 | Disk drive with flexible data stream encryption A cipher engine performs cipher processing (encrypting/decrypting) on logical data streams in a physical data stream in a storage device. As the physical data stream changes from a first logical data stream to a second logical data stream, and the cipher engine swit... | 10/20/2009 |
| 7602909 | Self-service terminal A self-service terminal (10) is described. The terminal (10) includes a plurality of modules (14) arranged in a network (16) so that the modules are operable to communicate using the network (16). Each module (14) has storag... | 10/13/2009 |
| 7580520 | Methods for scaling a progressively encrypted sequence of scalable data A method for scaling a progressively encrypted sequence of scalable data is disclosed. The method includes associating data with the progressively encrypted sequence of scalable data that identifies combinable portions of the progressively encrypted sequence of scal... | 08/25/2009 |
| 7551736 | Physical layer header scrambling in satellite broadcast systems Methods and apparatuses for minimizing co-channel interference in communications systems are disclosed. A method in accordance with the present invention comprises scrambling a first header of the first signal using a first scrambling code, scrambling a second heade... | 06/23/2009 |
| 7522724 | System and method of transmission of generalized scalable bit-streams A method of encrypting a transmission unit of a generalized scalable bit-stream includes, encrypting a plurality of logic units of the transmission unit using a unique encryption key for each logic unit, where the unique encryption keys for the transmission unit for... | 04/21/2009 |
| 7522725 | Method and apparatus for composable block re-encryption of publicly distributed content Secure communication from one encryption domain to another using a trusted module. In one embodiment, the invention includes receiving encrypted streamed content encrypted with a first key, generating a substitution key stream based on the first key and a second key... | 04/21/2009 |
| 7505588 | Stream cipher design with revolving buffers Techniques are disclosed to limit short-term correlations associated with outputs of stream cipher keystream generators. Output values of a generator are paired such that the paired outputs are sufficiently far apart to be considered independent. In one described im... | 03/17/2009 |
| 7505589 | Ternary and higher multi-value digital scramblers/descramblers Ternary (3-value) and higher, multi-value digital scramblers/descramblers in digital communications. The method and apparatus of the present invention includes the creation of ternary (3-value) and higher value truth tables that establish ternary and higher value sc... | 03/17/2009 |
| 7440570 | Method and apparatus for remote digital key generation A method and apparatus that uses tha dynamics of chaotic system for the remote generation of a digital key, for use in any encryption algorithm. After initialization, the dynamics of a chaotic system are allowed to generate the 0 and 1 bits of a key bistream. An ini... | 10/21/2008 |
| 7430292 | Methods and systems for securing information communicated between communication devices A system is provided for generating information for secure transmission from a first device to a second device. The system comprising a key scheduler for generating a dynamic secret key, a synchronization generator for generating a synchronization sequence and contr... | 09/30/2008 |
| 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 |
| 7426272 | Instrumentation privacy methods and apparatuses The present invention provides methods and apparatuses for implementing communications privacy on a class of two-way wireless control communications. The methods and apparatuses of the present invention are cryptographic in nature and are built on a symmetric crypto... | 09/16/2008 |
| 7424112 | Ciphertext switching for syntax compliant encryption Systems and methods providing ciphertext switching for syntax compliant encryption are described. In one aspect, intermediate ciphertext is generated from syntax compliant plaintext. Post-processing is applied to the intermediate ciphertext to determine if there are... | 09/09/2008 |
| 7421080 | Method of reconstructing a secret, shared secret reconstruction apparatus, and secret reconstruction system Secret information is shared by a group of members by giving each member a first share of the information. To reconstruct the secret information, a subgroup consisting of some or all of the members generate second shares from their first shares, and distribute the s... | 09/02/2008 |
| 7421076 | Advanced encryption standard (AES) engine with real time S-box generation An advanced encryption standard (AES) engine with real time S-box generation includes a Galois field multiplier system in a first mode responsive to a first data block for generating an AES selection (S-box) function by executing the multiplicative increase in GF | 09/02/2008 |
| 7418098 | Data type preserving encryption A method and a system for encryption of a data element in a relational database, wherein each data element includes a string of at least one character. The method includes the steps of: reading the type of a data element which is to be encrypted; interpreting the da... | 08/26/2008 |
| 7412605 | Method and apparatus for variable encryption of data A system and method for encrypting content in an adaptive manner. Portions of data to be encrypted are identified and an encryption ratio that specifies the one or more portions of data to encrypt and other portions of data to not encrypt is determined. The data is ... | 08/12/2008 |
| 7403615 | Methods and apparatus for accelerating ARC4 processing Methods and apparatus are provided for improving ARC4 processing in a cryptography engine. A multiple ported memory can be used to allow pipelined read and write access to values in memory. Coherency checking can be applied to provide that read-after-write and write... | 07/22/2008 |
| 7400730 | Cryptographic communication method in communication system An RNC server issues an encryption start instruction to a media gateway (MG) and a terminal. The MG and terminal, which have received the encryption start instruction, encrypt U-Plane information using a predetermined secret key, and adds a predetermined encryption ... | 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 |
| 7382876 | Hash function constructions from expander graphs Hash function constructions from expander graphs are described. In one aspect, an expander graph is walked to compute a hash function. The expander graph is walked using respective subsets of an input message. A label of a last vertex walked is an output of the hash... | 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 |
| 7376826 | Methods and apparatus for performing encryption and authentication Methods and apparatus are provided for a cryptography accelerator to efficiently perform authentication and encryption operations. A data sequence is received at a cryptography accelerator. An encrypted authentication code and an encrypted data sequence is provided ... | 05/20/2008 |
