Cryptography inventions 11/05

20050259815 - Celestial body communication techniques: In a communication technique using the apparent distribution of stars and other celestial bodies visible from the earth to generate codes corresponding to communication characters such as the English alphabet and or Arabic numbers, the characters of a conventional keyboard, or any other suitable character set. The stars, or subset...

20050259813 - Method for partially encrypting program data: A cable television system provides conditional access to services. The cable television system includes a headend from which service “instances,” or programs, are broadcast and a plurality of set top units for receiving the instances and selectively decrypting the instances for display to system subscribers. The service instances are partially-encrypted...

20050259814 - Table masking for resistance to power analysis attacks: Tables are defined to permit output masking for table look-ups to be carried out to resist power analysis attacks on cryptographic operations. A set of individually defined random values is used to mask each entry in a substitution table, defining a masked substitution table. A mask table is also defined...

20050259816 - Method and apparatus for restriction use of storage medium using user key: A method and apparatus for restricting the use of a disc are provided. In this method, first, lead-in data is read out from a loaded disc. Then, a user key is read out from a lead-in area of the disc. Thereafter, the user key undergoes authentication based on a user...

20050259817 - Method and apparatus for communication efficient private information retrieval and oblivious transfer: A method, article of manufacture and apparatus for performing private retrieval of information from a database is disclosed. In one embodiment, the method comprising obtaining an index corresponding to information to be retrieved from the database and generating a query that does not reveal the index to the database. The...

20050259818 - Method for authentication of pharmaceutical products: A method for authenticating a pharmaceutical product, the pharmaceutical product being associated with packaging having disposed thereon or therein coded data including a number of coded data portions, each coded data portion being indicative of an identity of the pharmaceutical product and at least part of a digital signature of...

20050259819 - Method for generating hashes from a compressed multimedia content: Method and apparatus for generating a hash signal representative of a multimedia signal are described. The method includes receiving a bit-stream comprising a compressed multimedia signal, selectively reading from the bit-stream predetermined parameters, and deriving a hash function from the parameters....

20050259820 - Temporally distributed watermarking for image sequences: A method for temporally distributing a watermark signal into a sequence comprising a plurality of original image frames is disclosed. The watermark signal represents an N-bit codeword, where N is greater than or equal to two. For each original image frame in the sequence, a subset of bits is selected...

20050259821 - Data multiplexing device, program distribution system, program transmission system, pay broadcast system, program transmission method, conditional access system, and data reception device: In a data multiplexing device which multiplexes and transmits the transport stream packets of program data consisting of a plurality of data elements constructed in the form of transport stream packets, a program distribution system, a program transmission system, a pay broadcast system, a program transmission method, a conditional access...

20050259822 - Sinusoidal audio coding: Coding (1) an audio signal (x) comprises providing a respective set of sampled signal values for each of a plurality of sequential segments. The sampled signal values are analysed (130) to generate one or more sinusoidal components for each of the plurality of sequential segments. The sinusoidal components are linked...

20050259824 - Information processing apparatus, information processing method, and information processing program: An information processing apparatus has an authentication/key exchange unit, a round trip time measuring unit, a common key transmitter, a contents transmitter and a contents transmitter. The round trip time measuring unit sends a round trip time measuring request generated to the communication apparatus through the first communication connection to...

20050259823 - Security system with an intelligent dma controller: A security subsystem is provided with at least a first security engine, a first set of registers and a control portion to perform a first security operation for each of a first number of data blocks of each of a first number of data segments of a first data object....

20050259825 - Key bank systems and methods for qkd: Key banking methods and systems for quantum key distribution (QKD) are disclosed. A method of the invention includes establishing a primary key bank that stores perfectly secure keys associated with exchanging true quantum pulses between two QKD stations Bob and Alice. The method also includes establishing a secondary key bank...

20050254644 - Anti-pirate method for the distribution of digital content by pro-active diversified transmission, associated transmitting device and portable receiving object: The invention concerns an anti-pirate method for the distribution of digital content by pro-active diversified transmission, associated transmitter device and portable receiving object. The method, designed to make the same information (Kc) available to several receivers (1) belonging to a group (G) of receivers, each receiver storing information (SAi) specific...

20050254645 - System and method for safeguarding data between a device driver and a device: A data safeguarding system, method, and article for safeguarding an encrypted data-stream transmitting on a first channel from a first system to a second system. The data-stream can be intertwined with other data-streams. The data-stream is arranged in fixed length sequential blocks, each block including a header portion and a...

20050254646 - Variable size key cipher and method and device using the same: An encryption device and method and decryption device and method which implement a bit-based encryption scheme and hardware design. The encryption device includes a random number generator, receiving a main key, determining a working key using at least one random number and outputting a working key, a model, receiving the...

20050254647 - Wireless transceiver system for computer input devices: A wireless interface device for a keyboard of a computer system is achieved. The device comprises a radio transmitter and receiver. A modem encodes data to be sent by the radio transmitter and decodes data received by the radio receiver. A central processing unit is included. A direct signal connection...

20050254648 - Conditional access data decrypting system: This system includes a diffusion centre (10) arranged to diffuse data encrypted by control-words (cw), at least one management centre (11) arranged to diffuse personal messages (ECM, EMM) related to the management of access means to encrypted data, an operating device (12) intended to render usable said encrypted data, and...

20050254649 - Encrypted and watermarked temporal and resolution layering in advanced television: A method and apparatus for image compression using temporal and resolution layering of compressed image frames, and which provides encryption and watermarking capabilities. In particular, layered compression allows a form of modularized decomposition of an image that supports flexible encryption and watermarking techniques. Using layered compression, the base layer and...

20050254650 - Authentication system, authentication device, terminal device, and authentication method: An authentication system giving little load for the user at the time of authentication and retaining high security is realized. A management part 107 of a server apparatus 106 memorizes a password of a character queue of a plurality of digits. A random number generating part 108 generates a random...

20050254652 - Automated network security system and method: A method is presented for automatically providing a secure connection between a wireless network including a server and server software installed thereon and a device seeking access to the wireless network. In response to an initial request for access to the wireless network by the device, a software agent is...

20050254653 - Pre-authentication of mobile clients by sharing a master key among secured authenticators: Systems and methods for pre-authenticating a mobile client in a wireless network. Authenticators in a secured section of the wireless network share a master key generated during an authentication session between a mobile client and an authentication server. The shared master key is not allowed to reside on any devices...

20050254654 - Security state vector for mobile network platform: State of security in a mobile communications network is communicated. Data regarding nature and severity of security events onboard at least one mobile platform is generated and processed. A message that includes the processed data is generated and transmitted periodically. The processed data makes up a security state vector that...

20050254655 - System and method for aggregating network: There is provided a system and method for aggregating network resources among a plurality of mobile stations. The multiplexing network entity (104) includes a subscriber database (406) and a server (404) coupled to the subscriber database. The subscriber database (406) is capable of storing an identification, a access number, and...

20050254651 - Wireless access system, method, signal, and computer program product: A system, method, signal, and computer program product for providing secure wireless access to private databases and applications without requiring a separate wireless client-server internetworking security protocol infrastructure. The wireless device (201) communicates with the wireless access service provider (205) via hypertext transfer protocol (HTTP) messages, and the wireless access...

20050254656 - Efficient transmission of cryptographic information in secure real time protocol: Efficient transmission of cryptographic information in secure real time protocol. A transmitting terminal may be used to encrypt data with a session key derived from a bit-stream. The bit-stream may be sent with header information to the receiving terminal. To conserve bandwidth, the information may be divided into portions, and...

20050254657 - Optical disk player: An optical disk player to reproduce information recorded on an optical disk, being operable by a remote controller, includes a system controller. The system controller displays an image of the remote controller on a display device by set-up. The system controller stores different items of color information for discriminating, from...

20050254658 - System and method for generating reproducible session keys: A system and method for generating reproducible session keys in a wireless messaging system. The session key is generated based on a hash of a message itself, optionally concatenated with additional information. Since the local server stores the message, it can easily regenerate the same session key in response to...

20050249348 - Data encryption/decryption method, device, and program: Encryption is executed with respect to an encryption target unit based on an encryption ratio with maintaining the same data length both prior to and subsequent to the encryption process. In Pattern 1, one third from the encryption target unit is encrypted, while two thirds (the rest) of the encryption...

20050249349 - Matrix encryption method and system: Disclosed are an encryption method and system. The method comprises the steps of providing a message to be encrypted, said message having a string of characters; and providing a matrix having characters in a last row and numbers in all other rows. A string of numbers is formed from said...

20050249350 - Digital media conditional access system for handling digital media content: A method, apparatus, and article of manufacture provide the ability to process digital media content. A secret key (Ka) is obtained and encrypted into an authorization key message (AKM) message. One or more entitlement keys (Ke) are then obtained and encrypted using the secret key (Ka) as an encryption key...

20050249351 - Information providing method, information providing system, information providing device, and information acquisition device: A computer unit 71 disposed at a vehicle assembly plant 70 sends to an information providing center 40 chassis number information and MAC address information and phone number information of a communication unit 15 of a vehicle. A computer unit 81 at a vehicle sales shop 80 transmits to the...

20050249352 - Quantum-key distribution method between a plurality of users or groups: There is provided a quantum-key distribution method between a plurality of users or groups. A center prepares a predetermined number of entangled states consisting of qubits equal to the number of the users, and generates quantum states consisting of the qubits belonging to each of the entangled states and corresponding...

20050243998 - Apparatus and method for consistency checking public key cryptography computations: A cryptographic system comprising: 1) a first Montgomery-based cryptographic engine that receives a first operand and a second operand and generates a first result and 2) a second Montgomery-based cryptographic engine that receives a first reduced operand derived from the first operand and a second reduced operand derived from the...

20050243999 - Protecting decrypted compressed content and decrypted decompressed content at a digital rights management client: Theft of decompressed digital content as the content is being rendered is prevented. A requested slow-down of the rendering of the content is detected. Transfers of relatively large amounts of data are detected. A re-compressor-based requested slow-down of the rendering of the content is detected. A re-compressor re-compressing the content...

20050244000 - Fast-key generator for encryption, authentication or security: A key generator that instantaneously generates an encryption/decryption key to provide a roaming device with secure and seamless access to various access points of a wireless network without interruption. The key generator comprises a multi-byte identifier shared by devices communicating with the network, a hashing module to transform the multi-byte...

20050244002 - Device for preventing unauthorized use of literary work recording medium: An apparatus for preventing an unauthorized use of a copyright medium adapted to identify a purchaser by authentication of the purchaser's fingerprint at the time of purchasing an encrypted copyright medium, so that only the purchaser can reproduce or copy work data recorded in the copyright medium. Data is read...

20050244001 - Information recording medium drive device: The present invention provides a configuration capable of effectively preventing an encrypted content stored on an information-recording medium from being misused. In this configuration, a seed (seed 2) required for generating a block key to be applied to a process to decode an encrypted content is stored as information encrypted...

20050244003 - Modulator, modulation method, and method of manufacturing an optical recordable medium with enhanced security for confidential information: A modulator includes a replacement processing unit which replaces a part of main information code-converted in a main information converter with specific information code-converted in a specific information converter and a direct-current component suppress processing unit which performs direct-current component suppress processing for the main information which has undergone the...

20050244004 - Information processing apparatus and method: There is provided an information processing method/apparatus for demultiplexing object streams from a datastream which includes a plurality of object streams each having predetermined information, and decoding, synthesizing, and outputting the object streams, wherein the object streams are authenticated, and whether or not the playback control of a predetermined object...

20050244005 - Frame-accurate editing methods and systems: Methods and systems enable content authors to achieve frame-accurate editing and, in at least some embodiments, reduce the amount of content that needs to be decompressed in order to operate on the frames. Some embodiments ensure that bit rate integrity is preserved so that bit rate conditions associated with streaming...

20050244006 - Record carrier with multiple built-in chips: The invention relates to a system for improved access control, in particular copy protec-tion, and improved personalized processing of information, the system comprising a record carrier (1) like a CD-RW+ or a DVD storing copy-protected information and a device for reading and/or writing the record carrier. For that, the record...

20050244008 - Protecting decrypted compressed content and decrypted decompressed content at a digital rights management client: Theft of decompressed digital content as the content is being rendered is prevented. A requested slow-down of the rendering of the content is detected. Transfers of relatively large amounts of data are detected. A re-compressor-based requested slow-down of the rendering of the content is detected. A re-compressor re-compressing the content...

20050244007 - System and method for securing data: In accordance with the teachings described herein, systems and methods are provided for securing data for transmission to a wireless device. The disclosed systems and methods may include an electronic messaging system used to send and receive data over a first network and also used to forward data to a...

20050244009 - System and method for obtaining certificate status of subkeys: Systems and methods for updating status of digital certificate subkeys. A request is made to a key server to verify if a given key is revoked. If it is not, then the key with its subkeys is acquired from the key server. If one or more subkeys or signatures of...