Cryptography inventions 10/09

20090245508 - Converter, encryption/decryption system, multi-stage converter, converting method, multi-stage converting method, program, and information recording medium: A converter uses a predetermined parameter a. A generating unit accepts generated inputs x1, . . . , xn, and generates generated outputs, y1, . . . , yn, using recurrence formulas, y1=F1 (x1, a) and yi+1=Fi+1 (xi+1, y1) (1≦i≦n−1). A key accepting unit accepts key inputs, k1, . .... Agent: Mitchell P. Brook Luce, Forward, Hamilton & Scripps LLP

20090245507 - Data processing system and data processing method: First, the sieving unit eliminates “bad” candidates by checking their divisibility by small primes reconstructed by the calculation unit. After that, the primality of the remaining candidates is tested using the primality testing unit. The primality testing unit uses the recoding unit to change the representation of prime candidates. The... Agent: Miles & Stockbridge Pc

20090245506 - Fourier series based authentication/derivation: For purposes of cryptographic authentication, verification and digital signature processes, a derivation function is provided. The derivation function is generated from a Fourier series, using a prime number to compute the initial value in the series.... Agent: Apple C/o Mofo Palo Alto

20090245505 - Multiplication circuit and de/encryption circuit utilizing the same: A multiplication circuit generates a product of a matrix and a first scalar when in matrix mode and a product of a second scalar and a third scalar when in scalar mode. The multiplication circuit comprises a sub-product generator, an accumulator and an adder. The adder is configured to sum... Agent: Wpat, Pc Intellectual Property Attorneys

20090245509 - Transmitting apparatus, receiving apparatus, and data transmitting system: Video data exploitation by alteration of data is prevented. An extractor 111 extracts valid video data in data 110 and predetermined data in the data. An inserter 114 inserts an arithmetic operation result of the predetermined data by an arithmetic operation unit 113 into the valid video data encrypted by... Agent: Frommer Lawrence & Haug

20090245510 - Block cipher with security intrinsic aspects: A block cipher or other cryptographic process intended to be efficiently implemented in hardware (circuitry) includes an s-box (substitution operation) which does not require a look up table, but may be implemented solely with Boolean logic operations (logic gates). Also provided is an associated key scheduling process.... Agent: Apple C/o Morrison And Foerster ,llp Los Angeles

20090245512 - Image decryption apparatus: A display processor displays on a display screen an encrypted image accepted by an image data acceptor. An encrypted region acquirer extracts encrypted regions contained on the encrypted image. A target region selector or an authorized target region selector selects decryption target regions from among encrypted regions contained in the... Agent: Staas & Halsey LLP

20090245511 - Image encryption apparatus and image decryption apparatus: In an image encryption apparatus, each of pixel-value inverse-converters applies pixel-value inverse-conversion on an input image in each of previously-encrypted areas. An image combiner superimposes images with inversely-converted pixels in the previously-encrypted areas to the input image to obtain a ready-to-encrypt image. An image encryptor scrambles blocks in the ready-to-encrypt... Agent: Staas & Halsey LLP

20090245513 - Image encryption apparatus and image decryption apparatus: In an image encryption apparatus for visually encrypting an input image, an encryption area selector selects an encryption area within an input image including an area to be encrypted. An image converter divides the encryption area into a plurality of blocks. The image converter divides each block of the encryption... Agent: Staas & Halsey LLP

20090245514 - Forensic decryption tools: Providing authorized copies of encrypted media content including: receiving application for authentication to make copies of the media content; providing forensic decryption tools to process the media content; transmitting a permission to make copies of the media content using the forensic decryption tools; performing authorized decryption of the media content;... Agent: Procopio, Cory, Hargreaves & Savitch LLP

20090245515 - Method, system, and program product for asymmetric key generation: In asymmetric cryptography, initially-set public key and private keys are updated as a function of the chosen prime number pair, a host sending an updated public key exponent and a unique prime-pair key associated with the chosen prime number pair to the client, the client using the unique prime-pair key... Agent: Driggs, Hogg, Daugherty & Del Zoppo Co., L.p.a.

20090245516 - Method and system for high entropy encryption using an unpredictable seed based on user regisration time: A method of encryption of data for transmission in a secured manner over a communication channel. The encoding key is continually changed in response to each packet of data encoded, depending on a Seed Key and time stamping of data packets or a pseudo random sequence generated using synchronized clocks.... Agent: Alix Yale & Ristas LLP

20090245517 - Systems and methods for group key distribution and management for wireless communications systems: A novel group key distribution and management scheme for broadcast message security is provided that allows an access terminal to send a single copy of a broadcast message encrypted with a group key. Access nodes that are members of an active set of access nodes for the access terminal may... Agent: Qualcomm Incorporated

20090245518 - Secure communications in computer cluster systems: A system to improve communication security in cluster machine processing may include interconnected computers that can jointly process data. The system may also include a shared secret key used by each of the interconnected computers to encrypt, decrypt, and/or authenticate data being sent, or received, from one of the interconnected... Agent: Ibm Corporation Intellectual Property Law

20090245519 - Renewal management for data items: A system, method apparatus, and computer readable medium for managing renewal of a dynamic set of data items. Each data item has an associated renewal deadline, in a data item management system. A renewal schedule allocates to each data item a renewal interval for renewal of the data item. On... Agent: Ibm Corporation, T.j. Watson Research Center

20090245520 - Digital content protection methods: An digital content protection method and device are disclosed. In the method, digital content to be delivered from a content provider to a consumer terminal is retrieved. The digital content is encoded to prevent unauthorized playback. The encoded digital content and a key for decoding the content are separately transmitted... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090245521 - Method and apparatus for providing a secure display window inside the primary display: In some embodiments, the invention involves securing sensitive data from mal-ware on a computing platform and, more specifically, to utilizing virtualization technology and protected audio video path technologies to prohibit a user environment from directly accessing unencrypted sensitive data. In an embodiment a service operating system (SOS) accesses sensitive data... Agent: Join D. Stutman-horn Intel Corporation C/o Intellevate, Llc

20090245522 - Memory device: A method of controlling a memory device connectable to a host for sending out a command to the memory device, has storing a plurality of first keys which are accessible by a plurality of passwords, respectively, encrypting a second key for encrypting and decrypting data to produce an encrypted second... Agent: Greer, Burns & Crain