Cryptography inventions 05/06

20060109981 - Small hardware implementation of the subbyte function of rijndael: A small hardware implementation is provided for the Advanced Encryption Standard SubByte function that implements the affine transform and inverse transform in a single Affine-All transform using a multiplicative inverse ROM. The logic is greatly reduced and the maximum path delay is reduced compared to a multiplexor implementation and is...

20060109982 - Unit for managing audio/video data and access control method for said data: A digital audio/video data processing unit and an access control method to this data are disclosed. The processing unit of audio/video digital data encrypted with control-words coming from control messages includes a deciphering unit of the audio/video data, a decompression unit, an input/output interface of the processed audio/video data and...

20060109984 - Methods for audio watermarking and decoding: An identification code signal is hidden in a carrier signal (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned. The carrier signal can thereby be identified, or some machine responsive action can thereby be taken. The technique...

20060109983 - Signal masking and method thereof: A method and corresponding apparatus of adaptively masking signals in an efficient effective manner includes providing a signal; generating a masking signal that adaptively corresponds to the signal; and inserting the masking signal into a channel corresponding to the signal at a location proximate to the source of the signal...

20060109985 - Broadcast encryption with dual tree sizes: A method, system, and computer program product for broadcast encryption key management. The invention eliminates the need for pre-specification of a maximum number of keys that can be employed in a given broadcast encryption system by enabling an initial key to be extended by a link key. New receiver devices...

20060104438 - Method for making secure an electronic entity with encrypted access: A method for protecting an electronic entity with encrypted access, against DFA (Differential Fault Analysis) attacks which includes: storing the result of a selected step (Rm, Kn) of an iterative process forming part of the cryptographic algorithm and in performing once more at least part of the steps of the...

20060104439 - Method and system for shifting key agreement status and information storage medium: A method for shifting a key agreement status in a public-key cryptographic protocol that allows key agreement between three devices includes the steps of, under condition that allow key agreement between three devices including a first device, a second device, and a dummy device, reaching key agreement between the first...

20060104442 - Method and apparatus for receiving broadcast content: An apparatus for receiving broadcast content is provided. The apparatus includes a receiving unit generating the broadcast content from a broadcast stream received from a content provider via a broadcast channel; a content encrypting unit encrypting the broadcast content using a content key; and a link generating unit generating a...

20060104441 - Password protection: Systems and methods for password protection are described. In one aspect, an asymmetric key pair is deterministically formed by combining a password and other data. The public key of the asymmetric key pair is exported to an external device. The private key of the asymmetric key pair is used to...

20060104440 - Simplified method for renewing symmetrical keys in a digital network: The invention concerns a method implemented in a communication network comprising a source device including: a first symmetrical key for encrypting data to be transmitted to a display device connected to the network; and the first symmetrical key encrypted with a second symmetrical network key known only to at least...

20060104443 - Method, apparatus and system for resistance to side channel attacks on random number generators: A random number generator (RNG) resistant to side channel attacks includes an activation pseudo random number generator (APRNG) having an activation output connected to an activation seed input to provide a next seed to the activation seed input. A second random number generator includes a second seed input, which receives...

20060104444 - System and practice for surveillance privacy-protection certification and registration: There is provided an apparatus for the certification of privacy compliance. The apparatus includes a registry of at least one of enrolled video surveillance operators, approved surveillance hardware devices, approved surveillance software programs, approved surveillance system installers, and approved entities that manage surveillance systems. The apparatus further includes a registry...

20060104445 - Systems and methods for hiding a data group: A system is provided for hiding a data group in a wireless communication device, in which a predetermined data group is hidden according to a hiding request. The system for hiding a data group comprises an encryption module for receiving the hiding request and the predetermined groups in a memory...

20060104446 - Online data encryption and decryption: Systems and methods for providing encryption and decryption of data transmitted on a computer implemented network, preferably user authentication identifier data, such as a password, at the point of entry into the user's computer. The systems and methods enable an end user to mentally select a marker from one of...

20060104447 - Discrete logarithm-based cryptography using the shafarevich-tate group: Systems and methods for discrete logarithm-based cryptography using the Shafarevich-Tate group are described. In one aspect, a Shafarevich-Tate group is generated from an abelian variety. Data is encrypted or signed or a common secret is established as a function of a secret generated from the Shafarevich-Tate group....

20060104448 - Data transmission method and apparatus and data receiving method and apparatus for multiple access in chaotic communication system: A data transmission method and apparatus and a data receiving method and apparatus provide for multiple access in a chaotic communication system. The data transmission method includes arranging a template chaotic signal at a predetermined position of a data frame to be transmitted, the predetermined position being allocated to a...

20060104449 - Record carrier with distributed decryption information: The invention relates to a system for improved copy protection comprising a record carrier like a CD-RW+ or a DVD storing copy-protected information and a device for reading from and/or writing to the record carrier. For that the record carrier (1) has a first area (3) storing information (data), which...

20060104450 - Method and system for providing for security in communication: A method (and system) of securely communicating, includes using one of a preliminary secure transmission and exchange or acquisition of secret information that provides parties with a random sequence known only to first and second parties in communication with one another, and linking one of the first and second parties...

20060098814 - Method for communicating securely over an insecure communication channel: A method for enhancing the security of cryptographic systems against side channel attacks and cryptanalysis is based on the concept of object hopping or dynamic transformation of elements between objects that share the same category and/or floating objects which facilitate object hopping. The use of floating objects and floating finite...

20060098815 - Methods of encoding and decoding data: A cryptographic process (100) receives variable length user data (150) as input and performs an initialization process, at least one pass of at least one pass function and an output function. The pass function the invokes at least one round function (171). Each round function (171) receives inputs which are...

20060098817 - Method of and apparatus for encoding a signal in a hashing primitive: A process (100, 200, 300) receives at least one block of plaintext material (161, 163, 271, 273) and initializes intermediate text (150, 250). The intermediate text (150, 250) is larger than 58 octets. An updating process includes the invocation of at least one round function (171, 172, 282, 282). Each...

20060098816 - Process of and apparatus for encoding a signal: A cryptographic process includes an initialization process, invokes at least one round function (171, 172, 281, 282) and has an output function. The initialization process initializes intermediate text (150, 250) which has more than 58 octets. Each round function (171, 172, 281, 282) updates the intermediate text. Each round function...

20060098818 - Encryption technique for asynchronous control commands and data: A method of transmitting information from a primary storage control unit to a secondary storage control unit in an asynchronous data copying system. The method includes building multiple descriptor blocks for transmission from the primary storage control unit, and encrypting multiple payloads according to one of n encryption methods. In...

20060098819 - Methods, devices and systems for generating anonymous public keys in a secure communication system: Methods, devices and systems for generating a plurality of public keys from one private key with the same generator of a group are described. A public key cryptosystem is also disclosed for generating a plurality of anonymous public keys all of which relate to the same party used for secure...

20060098820 - Method and apparatus for generating keystream: A method and apparatus for generating a keystream are provided. The method includes: (a) receiving a bitstream comprised of at least 4 bits; (b) selecting at least two bits from the received bitstream; (c) generating an operation value by performing a predetermined bitwise operation on the bits selected in (b);...

20060098821 - Information processing apparatus: A digital TV broadcasting reception processing unit including a digital TV tuner and an OFDM demodulator receives a digital broadcasting program of the terrestrial digital TV broadcasting. An analog TV broadcasting reception processing unit including an analog TV tuner and an MPEG 2 encoder receives an analog broadcasting program of...

20060098822 - Interoperable conditional access receptors without consensual key sharing: A method and device for forcing the coexistence of different conditional access systems in an existing conditional access system. In one embodiment, the keys used to encrypt the pay television programming are extracted from an incumbent conditional access system and sent in messages to the set top boxes of the...

20060098823 - Method and system for time interleaved digital to analog conversion for a cable modem: Provided is a transmitter in a communications system including a plurality of digital to analog converters. Also included is a plurality of clocks, each being communicably coupled to a corresponding one of the digital to analog converters....

20060098824 - Method and apparatus for providing short-term private keys in public key-cryptographic systems: A computing entity has an associated static public/private key-pair formed by a static private key comprising a secret, and a static public key comprising both a first element and that element combined with the secret. The secret is stored in higher-security storage provided, for example, by a smartcard. A short-term...

20060093135 - Method and apparatus for intercepting events in a communication system: An intercept system provides more effective and more efficient compliance with legal intercept warrants. The intercept system can provide any combination of operations that include near-real-time intercept, capture of intercepted data in structured authenticated form, clear text intercept for communications where there is access to encryption keys, cipher text intercept...

20060093136 - Implementation of a switch-box using a subfield method: Methods and systems for implementing a switch box (S-box) in a cryptographic application are described. An input to the S-box is converted from a Galois field representation GF(N2) to a Galois subfield representation GF(N)2. The input is converted using a generating polynomial of the form x2+Ax+B, where A and B...

20060093137 - Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem method, elliptic curve cryptosystem program and computer readable recording medium storing the elliptic curve cryptosystem program: An elliptic curve cryptosystem apparatus performing an elliptic curve cryptosystem process has a coordinate transforming unit for transforming coordinates (X:Y:Z) on a point P on an elliptic curve over a finite field GF(pˆm) to coordinates (r1×(X−s1):r2×(Y−s2):r3×(Z−s3)) (where, p is a prime number, m is an integer not less than 1,...

20060093138 - Secure authenticated channel: A protocol (i.e. method) and corresponding apparatuses for calculating a session key. Two peers with knowledge of a common Diffie-Hellman permanent key, Kperm, and the identity and public key of the other peer. A first peer chooses a first ephemeral private key x and calculates the first corresponding ephemeral public...

20060093140 - Content management for high definition television: A high definition television video content management and/or copy protection method and apparatus are achieved by modifying portions of one or more channels of an HDTV (high definition television) signal. These modifications are generally in the blanking intervals but can extend into the overscanned portions. In one version, the signal...

20060093139 - Defeat method and apparatus for content management for high definition television: A high definition television video content management and/or copy protection method and apparatus are achieved by modifying portions of one or more channels of an HDTV (high definition television) signal. These modifications are generally in the blanking intervals but can extend into the overscanned portions. In one version, the signal...

20060093141 - Digital encrypted time capsule: A method and apparatus for enabling and/or providing delayed decryption is disclosed. In one embodiment, the method comprises receiving encrypted information and additional information and decrypting the encrypted information, using the additional information, no sooner than a specified time. The additional information includes data indicative of the time....

20060093142 - Methods and apparatus for awarding prizes based on authentication of computer generated outcomes using coupons: The present invention provides authentication of computer generated game or test results (“outcomes”), and a system by which persons who play games or take tests on a game or testing computer, respectively, may submit the outcomes of the games or tests to a central authority having at least one central...

20060093143 - Method and system for generating shared information: A sender sends original random-number data to a receiver through a quantum channel. The receiver generates a raw key from information received through the quantum channel and notifies the received information to the sender. The sender performs received-bit comparison and basis reconciliation based on the received information and provisionally shares...

20060093144 - Communications method for at least two system components of a motor vehicle: In a communications system for at least two system components over a network connection, e.g., a CAN bus system of a motor vehicle, system components have ready in each case a prespecified, fixed number of test codes known only to them. Based on a time-variable signal which is accessible to...

20060093145 - Authentication apparatus, authentication method and authentication computer program product: An operation of an authentication apparatus is as follows: Moving image data including a plurality of pieces of still image frame data is accepted, and the move locus of at least one person image is detected based on the moving image data. Individual determination processing of adopting at least one...

20060093147 - Apparatus and method for scaramling/de-scrambling 16-bit data at pct express protocol: An apparatus and method for scrambling/de-scrambling 16-bit data at a PCI Express protocol are provided. The apparatus includes an 8-bit precedence shift register generator for calculating an 8-bit shift register value, and outputting an 8-bit precedence shift register value through an exclusive OR (XOR) operation with 8-bit input data; and...

20060093146 - Two-stage block synchronization and scrambling: A two-stage block synchronization and scrambling module includes a synchronization PRNG module, a scramble PRNG module, a summing module, and a storage module. The synchronization PRNG module is clocked once per N+1 bit PCS frame (N arbitrary) to produce a synchronization bit and a pseudo-random starting state for the scramble...

20060093148 - Systems and methods for the application of cryptosystems to the data link layer of packetized wireless networks: Systems and methods are presented for achieving various operational modes of packetized wireless network communication, specifically IEEE 802.11 Wireless LAN (WLAN), 802.16 Wireless MAN and WiMAX communication. By providing for various operational modes an increase in the overall security of the wireless network can be realized. The invention is based...

20060093149 - Certified deployment of applications on terminals: Embodiments of the present invention relate to secure deployment of software applications on transaction terminals using keys and certificates. In one embodiment, a method for electronically certifying an application for installation at a transaction terminal is accomplished at a terminal key management server by receiving an application along with a...

20060093150 - Off-loading data re-encryption in encrypted data management systems: Described is a solution for maintaining the security of encrypted data despite a compromised private key by using a re-encryption process that does not require decryption of the encrypted data. The compromised private key is re-encrypted using a new public key as is the encrypted symmetric key which the compromised...