Cryptography inventions 03/07

20070071235 - Encryption/decryption appararus: A first Exclusive OR circuit operates an Exclusive OR between input data and a predetermined random number. An operation circuit performs one operation of encryption and decryption of output data from the first Exclusive OR circuit. A data register circuit, which has a plurality of data hold units, holds data... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070071233 - Hash function using arbitrary numbers: A hash unit, including an input interface adapted to receive an input key, an arbitrary number generator adapted to generate one or more arbitrary numbers, a processor adapted to apply a multi-operand function to an input key received by the input interface together with each of one or more arbitrary... Agent: Wolf, Block, Schorr & Solis-cohen LLP

20070071234 - Methods for the storage and reading of a content, of the type implementing a content protection protocol, corresponding source, storage and sink devices: A method for the storage of a content from a source device to a storage device, the devices implementing a content protection protocol comprising a phase of exchanging a first encryption key (Kc) associated with a first key computation parameter (Nc). A storage method of this kind comprises the following... Agent: Fitzpatrick Cella Harper & Scinto

20070071236 - High speed configurable cryptographic architecture: Method and system to encrypt and decrypt data is provided. The method comprising, providing input data to be encrypted, said input data made up of a plurality of sub-data, each said sub-data comprising sequence of bits of data; dynamically selecting a plurality of invertible encryption parameters; and performing one or... Agent: Klein, O'neill & Singh, LLP

20070071237 - Custom static diffie-hellman groups: Methods for choosing groups for a static Diffie-Hellman key agreement protocol to inhibit active attacks by an adversary are provided. In mod p groups, an even h is chosen of value approximately (9/16)(log2n)2, values r and n are determined using sieving and primality testing on r and n, and a... Agent: Blake, Cassels & Graydon LLP

20070071238 - System and method for providing an indication of randomness quality of random number data generated by a random data service: A system and method for providing an indication of randomness quality of random number data generated by a random data service. The random data service may provide random number data to one or more applications adapted to generate key pairs used in code signing applications, for example. In one aspect,... Agent: Bereskin And Parr

20070071239 - Implementation of media-protection policies: A technique wherein a first electronic device, such as a server, provides to a second electronic device, such as a client device, a first portion of a digital-content stream. The first electronic device receives an identifier of a protection policy to be applied to the digital-content stream. The first electronic... Agent: Microsoft Corporation Attn: Patent Group Docketing Department

20070071240 - Process for identifying duplicate values in very large data sets: The present invention is directed to a method of identifying duplicate data elements in large data sets. This involves receiving the data sets. Dividing each data element in the data set into a series of data segments to define data keys. Generating an intermediate value for the each element in... Agent: Lsi Logic Corporation

20070071241 - Method, system, network and computer program product for securing administrative transactions over a network: Communication between an administrator device and an administered device in a network is arranged in the form of a chain of digitally signed communication items including messages sent from an originator device to a recipient device. Each message has an associated respective digitally signed receipt, and the originator device is... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070071242 - Communication system, common key control apparatus, and general communication apparatus: When a common key is updated to a new common key, it is possible to prevent the generation of a period during which not all the general communication apparatuses are enabled to make mutual communications using encrypted data while at the same time reducing the memory consumption of the general... Agent: Wenderoth, Lind & Ponack L.L.P.

20070071243 - Key validation service: A key validation service (KVS) provides the ability to assess the validity of the private key used to send secure information. Each time a user wants to send information to a recipient, the user first sends proof to the KVS that the user's private key is valid. When the KVS... Agent: Woodcock Washburn LLP (microsoft Corporation)

20070071245 - Methods and systems for communicating over a quantum channel: Alice generates a sequence of key bits forming an initial cryptographic key. Alice then uses the sequence of key bits and a sequence of cipher bits to control respective control parameters of a quantum encoding process applied to a sequence of quantum pulses, where the sequence of cipher bits used... Agent: Fetherstonhaugh - Smart & Biggar

20070071244 - Qkd station with efficient decoy state capability: A quantum key distribution station having the capability of forming decoy signals randomly interspersed with quantum signals as part of a QKD system is disclosed. The QKD station includes a polarization-independent high-speed optical switch adapted for use as a variable optical attenuator. The high-speed optical switch has a first attenuation... Agent: OpticusIPLaw, PLLC

20070064929 - Method of protecting a cryptographic algorithm: The method of protecting an algorithm that can be decomposed into the form of initial polynomials (Pi) of at least two variables and of degree not less than two, comprises the steps of making combined polynomials (Qk) each obtained from at least two initial polynomials (Pi, Pi+1), and of storing... Agent: Birch Stewart Kolasch & Birch

20070064930 - Modular exponentiation with randomized exponent: For the determination of a result of a modular exponentiation, a randomization auxiliary number is employed for the randomization of the exponent on the basis of the product of the public key and the private key less “1”. This randomization auxiliary number may be derived from the private RSA dataset... Agent: Dickstein Shapiro LLP

20070064932 - Accelerated verification of digital signatures and public keys: Accelerated computation of combinations of group operations in a finite field is provided by arranging for at least one of the operands to have a relatively small bit length. In a elliptic curve group, verification that a value representative of a point R corresponds the sum of two other points... Agent: Blake, Cassels & Graydon LLP Commerce Court West

20070064931 - Elliptic curve point multiplication: Systems and methods configured for recoding an odd integer and elliptic curve point multiplication are disclosed, having general utility and also specific application to elliptic curve point multiplication and cryptosystems. In one implementation, the recoding is performed by converting an odd integer k into a binary representation. The binary representation... Agent: Lee & Hayes PLLC

20070064933 - Method of symmetric key data encryption: A method of symmetric key encryption involves using a composition of transformations leading to an enhanced homophonic substitution, wherein the mapping of characters varies depending on the sequence of characters in the message text. In carrying out the method, encryption keys are first generated. Then, a polyalphabetic substitution is performed,... Agent: Mccormick, Paulding & Huber LLP

20070064935 - Generating key information for mutual access among multiple computers: Generating key information for mutual access among multiple computers A method for generating key information for mutual access among multiple computers, the method including configuring each of a plurality of computers to access common seed data, where the common seed data is the same for each of the computers, and... Agent: Stephen C. Kaufman IBM Corporation

20070064934 - Parallel cipher operations using a single data pass: Multiple cipher hardware algorithms are run in parallel over an input stream. For example, one algorithm can process the input stream using an old cipher key while a parallel algorithm processes the input stream using the current cipher key. Alternatively, multiple cipher operations can be performed in parallel enabling a... Agent: Tucker, Ellis & West LLP

20070064936 - Content data delivery method and content data delivery system and handheld device for use therein: There is provided a content data delivery system including a playback equipment that is adapted to be able to decrypt a content data encrypted with a content key data and to play back the decrypted content data and that holds an equipment ID to identify itself; a handheld device that... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070064937 - Method and apparatus for encoding or decoding a bitstream: The invention relates to a system for re-encoding bitstreams for content signals. A re-encoder (101) receives a bit-stream comprising e.g. an MPEG-2 encoded signal. The receiver (109) feeds the bitstream to an extraction processor (111) which extracts non-essential information from the bitstream thereby generating a reduced bitstream which is still... Agent: Philips Intellectual Property & Standards

20070064938 - Method and device for bonding sheets: A method and a device for bonding at least two sheets, is disclosed. The sheets may be joined by a groove and are connected to each other at least in one contact area in the sheet surface of the first sheet. The sheets may first be shaped whereby the first... Agent: Wolf Greenfield & Sacks, PC

20070064939 - Method for protecting broadcast frame: A method and system for protecting a broadcast frame are provided. A frame broadcasted through a packet switching network is protected and a wireless LAN system is included. A current frame is authenticated based on a TESLA scheme. The authentication of the broadcast frame can be performed without a time... Agent: Roylance, Abrams, Berdo & Goodman, L.L.P.

20070064940 - Utilizing data reduction in steganographic and cryptographic systems: The present invention relates to methods for protecting a data signal using the following techniques: applying a data reduction technique to reduce the data signal into a reduced data signal; subtracting the reduced data signal from the data signal to produce a remainder signal; embedding a first watermark into the... Agent: Scott A. Moskowitz

20070064941 - Control 3 signal synthesis: A method consistent with certain embodiments, of processing a received encrypted frame signal, wherein the received encrypted frame signal is indicative that a specific video frame is encrypted, involves receiving a video signal including the received encrypted frame signal; wherein the received video signal comprises a received bit stream; synthesizing... Agent: Miller Patent Services

20070064942 - Control apparatus and method utilizing identifying keys: Method and apparatus for system control includes inputs for an input device which may take the form of switches or sensors. Input device states are related to identification keys. The identification keys are communicated wirelessly or through hard-wired means to a system.... Agent: Kathryn A. Marra General Motors Corporation

20070064943 - Systems and methods for secure transaction management and electronic rights protection: The present invention provides systems and methods for secure transaction management and electronic rights protection. Electronic appliances such as computers equipped in accordance with the present invention help to ensure that information is accessed and used only in authorized ways, and maintain the integrity, availability, and/or confidentiality of the information.... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070064944 - Method and apparatus for symmetric-key decryption: A symmetric-key cryptographic technique capable of realizing both high-speed cryptographic processing having a high degree of parallelism, and alteration detection. The invention includes dividing plaintext composed of redundancy data and a message to generate plaintext blocks each having a predetermined length; generating a random number sequence based on a secret... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070064945 - Quantum communication system: A quantum communication system comprising a sending unit and a receiving unit, said sending unit comprising a photon source assembly configured to output a stream of pulses of light having at least two different intensities and a memory configured to store information for determining which pulses should be reference pulses... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070064946 - Computer-readable recording medium recording a character code encryption program, and a character code encryption method: A computer-readable recording medium recording a character code encryption program capable of encrypting character codes without changing the data length. When plaintext is input, a plaintext encoder converts character codes included in the plaintext to corresponding numerical values. Then, an encryptor successively acquires the numerical values of the individual character... Agent: Staas & Halsey LLP

20070064949 - Method and apparatus for sending and receiving plurality of data streams: In a MIMO multi-antenna system, multiplexing is performed in accordance with a multiplexing rule stored in at least one multiplex file for multiplexing a plurality of data streams on to a plurality of transmit data streams.... Agent: Dickstein Shapiro LLP

20070064948 - Methods and apparatus for the utilization of mobile nodes for state transfer: Methods and apparatus for storing, manipulating, retrieving, and forwarding state, e.g., context and other information, used to support communications sessions with one or more end nodes, e.g., mobile devices, are described. Various features are directed to a end node controlling the transfer of state from a first access node to... Agent: Straub & Pokotylo

20070064947 - Wireless communication authentication process and system: The present application relates to an authentication process and system for a wireless communication system between a host device and a client device. This authentication process and system can make the confirmation of the authentication easier and clearer.... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070064950 - Wireless communication system, wireless communication device, method of wireless communication, and computer program: A wireless communication system includes plural wireless terminals between which multi-hop communications are performed; wherein processing for extended route search is activated to carry out route search and key exchange at the same time, the processing using a routing control protocol including a key exchange protocol.... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070064951 - Method and system for key insertion for stored encrypted content: An encrypted content transport stream is received by a viewer's device and recorded for subsequent playback. During recording, keys in headers of packets of the stream are stripped and placed in sequence in a table. Also, the table indicates changes in key indicating bits. When it is desired to play... Agent: Rogitz & Associates

20070064952 - Internet facsimile relay apparatus and method, and storage medium: An Internet facsimile relay unit includes an e-mail receiving section that receives an e-mail including an image and a command to transmit the image as a facsimile to a terminal station, a decryption section that decrypts an e-mail by performing a corresponding decryption processing if the e-mail has been encrypted... Agent: Gauthier & Connors, LLP

20070058802 - Cryptosystem based on a jacobian of a curve: A cryptosystem has a secret based on an order of a group of points on a Jacobian of a curve. In certain embodiments, the cryptosystem is used to generate a product identifier corresponding to a particular product. The product identifier is generated by initially receiving a value associated with a... Agent: Lee & Hayes PLLC

20070058801 - Managing the encryption of data: Embodiments of methods, devices and/or systems for managing the encryption of data are described.... Agent: Berkeley Law & Technology Group

20070058800 - Transition between masked representations of a value during cryptographic calculations: In a method for the transition from a first masked representation of a value to be kept secret to a second masked representation of the value, according to a first aspect of the invention at least one previously calculated table with a plurality of entries is used, and the calculation... Agent: Martine Penilla & Gencarella, LLP

20070058803 - Information processing apparatus, verification processing apparatus, and control methods thereof: An information processing apparatus comprising, a first generation unit adapted to generate data to be signed by dividing a digital document into regions, a second generation unit adapted to generate first digest values of the data to be signed and identifiers used to identify the data to be signed, a... Agent: Fitzpatrick Cella Harper & Scinto

20070058804 - System and method for automatic redirection of a product under transport using an environmental sensor: Systems and methods disclosed herein use environmental sensor technology to enhance the tracking and transporting capabilities of a product delivery system. The systems and methods provide the capability to track and verify the environmental condition(s) to which a product is subjected during its transportation or movement through a supply chain.... Agent: Alston & Bird LLP

20070058805 - Encryption apparatus and method, and decryption apparatus and method based on block encryption: An encryption apparatus for block data, comprises a first processing unit randomizing the block data in units of first portions obtained by dividing the block data, and a second processing unit diffusing the block data output from the first processing unit with respect to a second portion of the block... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070058806 - Cipher for disk encryption: Encryption is provided with additional diffusion components to construct a block cipher with a large and variable block size. The cipher incorporates an encryption system or algorithm such that the cipher is at least as secure as the encryption system or algorithm. Additional components of the cipher provide improved diffusion.... Agent: Woodcock Washburn LLP (microsoft Corporation)

20070058807 - Establishing a unique session key using a hardware functionality scan: Systems and methods for independently generating a unique private session key at one or more hardware devices within a computing system using a subset of the functionality implemented in a hardware functionality scan combined with the use of a one-way mathematical function.... Agent: Microsoft Corporation Attn: Patent Group Docketing Department

20070058808 - Method and system for deriving an encryption key using joint randomness not shared by others: The present invention is related to a method and system for deriving an encryption key using joint randomness not shared by others (JRNSO). Communicating entities generate JRNSO bits from a channel impulse response (CIR) estimate and the JRNSO bits are used in generation of an encryption key. The authentication type... Agent: Volpe And Koenig, P.C. Dept. Icc

20070058809 - Protection of a digital content on a physical medium: A method of storage of digital data on a physical medium equipped with calculation circuitry, by ciphering the data using a symmetrical algorithm with a ciphering key independent from the recorder, and by transferring the ciphering key onto the medium or its calculation by an asymmetrical algorithm and a read... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, PC

20070058810 - Communication system and synchronization control method: A sender transmits to a receiver an optical signal that is phase-modulated in accordance with source data and a basis stored in a memory. The receiver phase-modulates the received optical signal in accordance with a basis, obtains detection data through interference, and stores the detection data in a memory. An... Agent: Sughrue Mion, PLLC

20070058811 - Method and apparatus to facilitate transmission of an encrypted rolling code: An encrypted rolling code (11), a plurality of differing data bit order patterns (13), and a plurality of differing data inversion patterns 14) are provided. One then selects (15) a particular one of each of these patterns and uses those selected patterns as transmission characteristics when transmitting (16) at least... Agent: Fitch Even Tabin And Flannery

20070058812 - Enforcing time-based transaction policies on devices lacking independent clocks: A system and a method for operating a device that is not capable of independently maintaining a local time clock to enforce a time-based transaction policy that requires a reliable time reference. The device establishes a secure communications channel to one or more network-attached time sources and inquires of each... Agent: Anderson & Jansson L.L.P.

20070058813 - Opportunistic use of null packets during encryption/decryption: The use of keys to encrypt data in a transmitter and to decrypt encrypted data in a receiver are synchronized in accordance with a synchronization signal that opportunistically replaces a null packet in an MPEG transport stream. Additionally or alternatively, key related information is transmitted and/or received in place of... Agent: Zenith Electronics Corporation

20070058814 - Method for undetectably impeding key strength of encryption usage for products exported outside the u.s.: In one embodiment, a communication device includes a key strength controlling agent 308 operable to (i) receive a request for a cryptographic key; (ii) determine, from a restriction identifier, whether the cryptographic key strength is restricted; (iii) when the cryptographic key is restricted, cause the use of a second cryptographic... Agent: Sheridan Ross P.C.

20070058815 - Method and apparatus for securely transmitting and receiving data in peer-to-peer manner: A method and apparatus for securely transmitting data between embedded devices are provided. The method includes: issuing a request for a session key that is to be used in a session with the device; restoring the session key by deciphering a ciphered session key included in a response to the... Agent: Sughrue Mion, PLLC

20070053506 - Elliptic curve encryption processor, processing method of the processor using elliptic curves, and program for causing a computer to execute point scalar multiplication on elliptic curves: An object is to make a conventional GLV scalar multiplication applicable to a wider range of elliptic curves. An elliptic curve encryption processor includes an input section 2 that inputs information indicating an elliptic curve E, a point P on the elliptic curve, and an operation value K; an embedding... Agent: Birch Stewart Kolasch & Birch

20070053509 - Method and apparatus for minimizing differential power attacks on processors: A method of masking a cryptographic operation using a secret value, comprising the steps of dividing the secret value into a plurality of parts; combining with each part a random value to derive a new part such that the new parts when combined are equivalent to the original secret value;... Agent: Blake, Cassels & Graydon LLP

20070053507 - Secure classifying of data with gaussian distributions: A first party has a data vector x and a second party has a classifier defined as a set of multivariate Gaussian distributions. A secure inner dot product procedure is applied to each multivariate Gaussian distribution and the data vector x to produce a vector ai for the first party... Agent: Patent Department Mitsubishi Electric Research Laboratories, Inc.

20070053508 - Security setting method of wireless communication network, security setting program, wireless communication network system and client device: Method, program, network system and client device for security setting of wireless communication network (wireless LAN device 2) to one or a plurality of connection destinations. It is a structure of being given encryption information different from given present encryption information by use of the given present encryption information and... Agent: Bingham Mccutchen LLP

20070053511 - Method and apparatus for providing privacy of user identity and characteristics in a communication system: A methods and apparatus for providing privacy of user identity and characteristics in a communication system. A public key and a private key is generated, corresponding to a transceiver. The public key is transmitted to a wireless communication device. The wireless communication device encrypts one or more an initial messages... Agent: Qualcomm Incorporated

20070053510 - Method and system of managing and filtering electronic messages using cryptographic techniques: Undesirable electronic messages, such as the unsolicited broadcast e-mail known as spam, is not only a nuisance, but wastes both computer and user resources. Conversely, desirable electronic messages with sensitive content is important to secure, so that it is not forged, tampered or revealed. Accordingly, the present invention provides cryptographic... Agent: Blake, Cassels & Graydon LLP

20070053512 - Method and apparatus for improving security in a voice over internet protocol session: A method and apparatus are disclosed for security in a VoIP (Voice over Internet Protocol) message. A system that incorporates teachings of the present disclosure may include, for example, an access point (104) has a transceiver (302) for coupling a VoIP terminal (102) with a communications network (110), and a... Agent: Akerman Senterfitt

20070053513 - Intelligent electronic appliance system and method: An intelligent electronic appliance preferably includes a user interface, data input and/or output port, and an intelligent processor. A preferred embodiment comprises a set top box for interacting with broadband media streams, with an adaptive user interface, content-based media processing and/or media metadata processing, and telecommunications integration. An adaptive user... Agent: Milde & Hoffberg, LLP

20070053514 - Continuous content playback system: A mobile terminal 100 holds identification information indicating specific content which the user has been viewing and listening to, and a playback position of the content. When receiving a request for continuous playback of the specific content from the user, the mobile terminal 100 acquires the storage location of the... Agent: Birch Stewart Kolasch & Birch

20070053515 - Semiconductor device using a read-only memory (rom) scrambling/descrambling method, and a method of operating the same: A semiconductor device includes a processor, a read-only memory (ROM), a key generator, and a restoration unit. The ROM stores scrambled or encrypted run code and key generation information. The key generator generates a key using the key generation information. The restoration unit restores original run code by descrambling the... Agent: F. Chau & Associates, Llc

20070053516 - Symmetric key encryption system with synchronously updating expanded key: A method, apparatus, and system of encryption, including embedding reconfiguration information within a ciphertext block destined for a decryptor. The decryptor identifies the reconfiguration information, extracts such information, and uses it to alter a pre-cipher, which is used for decryption. The encryptor alters its pre-cipher synchronously with the decryptor.... Agent: Schwegman, Lundberg, Woessner & Kluth, P.a.

20070053517 - Method and apparatus for the compression and decompression of image files using a chaotic system: A system for the compression and decompression of image files is provided. A library of basic waveforms is produced by applying selected digital initialization codes to a chaotic system. Each basic waveform is in one-to-one correspondence with an initialization code. A weighted sum of selected basic waveforms is used to... Agent: Fish & Neave Ip Group Ropes & Gray LLP

20070053518 - Method and system for conducting financial and non-financial transactions using a wireless device: The present invention relates to a method for conducting transactions, such as standard banking transactions, using a wireless device, such as a cellular telephone, personal digital assistant, and other web-enabled wireless devices utilizing software downloaded to the wireless device. The software provides a user with interface screens on the display... Agent: Kilpatrick Stockton LLP

20070053519 - Wireless adapter for data exchange and method: A wireless adapter is provided with a universal plug or jack and a wireless RS232 serial interface. The wireless adapter may include a BLUETOOTH® wireless transmitter and receiver operable to communicate data using a DEX/UCS protocol. The universal plug may be satisfactory used with conventional sockets associated with a manual... Agent: Baker Botts L.l.p. Patent Department

20070053520 - Method and apparatus for establishing a communication key between a first communication partner and a second communication partner using a third party: For establishing a communication key (KB) for a communication between a first communication partner (13) and a second communication partner (12), a third party (15) is used. After establishing a communication key between the first communication partner (13) and the third party (15) based on an identification of the first... Agent: Glenn Patent Group

20070047735 - Method, system and computer program for deploying software packages with increased security: A software distribution method (300) with security add-on is proposed. Particularly, any software package to be deployed to selected target endpoints is encrypted (312-315) with a symmetric key (generated dynamically). The symmetric key is in turn encrypted (318-321) with a public key of each target endpoint. A multi-segment software package... Agent: Ibm Corporation Intellectual Property Law