| 6956951 |
Extended key preparing apparatus, extended key preparing method, recording medium and computer program |
| Oct-18-2005 |
Intermediate data ai, bi, ci, and di are prepared by an intermediate data preparing equipment 4 from a cryptographic key through a nonlinear type function... |
| 6956946 |
Method and device for cryptographic processing with the aid of an elliptic curve on a computer |
| Oct-18-2005 |
In the case of cryptographic processing with the aid of an elliptic curve, parameters of the elliptic curve are stored in a memory of a computer. These parameters are each of substantial length. The elliptic... |
| 6943664 |
Process for controlling the resynchronization of a remote control with a changing code |
| Sep-13-2005 |
This process comprises the following steps: - detection of the need for resynchronization,
- identification of a desynchronized badge and memorization in a computer of a corresponding...
|
| 6931129 |
Method and apparatus for generating pseudo random numbers in a video device having an embedded cipher unit |
| Aug-16-2005 |
A video source device includes a cipher unit. The video source device uses the cipher unit to generate cipher bits for ciphering video to be transmitted to protect the video from unauthorized copying.... |
| 6928162 |
Method and system for manipulating and telescoping a hash function |
| Aug-9-2005 |
A method and system for providing a hash and a complement of the hash for an item in a computer system are disclosed. The method and system include providing a plurality of components from the item. The... |
| 6895090 |
Pseudo-noise sequence with insertion having variant length and position |
| May-17-2005 |
An augmented pseudo-noise sequence (10) is generated from a two or more pseudo-noise sequences, using LFSRs or other such devices. A segment (16) of a one pseudo-noise sequence (14), having an arbitrary... |
| 6888941 |
Method and apparatus for generating encryption stream ciphers |
| May-3-2005 |
A method and an apparatus for generating encryption stream ciphers are based on a recurrence relation designed to operate over finite fields larger than GF(2). A non-linear output can be obtained by using... |
| 6882689 |
Pseudo-chaotic communication method exploiting symbolic dynamics |
| Apr-19-2005 |
A pseudo-chaotic coding/modulation method. The coding method exploits symbolic dynamics of a chaotic map at the transmitter to encode data. The encoding synthesizes the chaotic map based upon the data... |
| 6862354 |
Stream cipher encryption method and apparatus that can efficiently seek to arbitrary locations in a key stream |
| Mar-1-2005 |
A stream cipher encryption method and apparatus that can efficiently seek to arbitrary location in a keystream, and a method of generating an arbitrary segment of keystream. |
| 6831980 |
Random number generator and method for same |
| Dec-14-2004 |
A method and system for generating random numbers is disclosed wherein an array of imaging sensors while not in normal use, captures ambient light and back scattered light. These light sources vary naturally... |
| 6829356 |
Server-assisted regeneration of a strong secret from a weak secret |
| Dec-7-2004 |
Methods for regenerating a strong secret for a user, based on input of a weak secret, such as a password, are assisted by communications exchanges with a set of independent servers. Each server holds a... |
| 6829355 |
Device for and method of one-way cryptographic hashing |
| Dec-7-2004 |
The present invention is a device for and method of generating a hash value for a message by padding the message, loading the padded message into a first shift register that generates values according... |
| 6823070 |
Method for key escrow in a communication system and apparatus therefor |
| Nov-23-2004 |
Method of monitoring a secure encrypted communication, where the encryption key(s) is recovered by an escrow center having a master and multiple agents and the master receives the key encrypted using a... |
| 6816595 |
Mini time key creation method and system |
| Nov-9-2004 |
To provide a method and a system for creating a mini time key from a time key, a plurality of mini time keys are created within a unit time period. First, a unit time decryption key is prepared immediately... |
| 6792566 |
Method and apparatus of pre-loading a seed for a test code of a physical layer device |
| Sep-14-2004 |
A method and an apparatus of loading a pre-load seed for a test code of a physical layer device (PHY). For a physical layer device including a scrambler and a Non-Return-to-Zero/Non-Return-to-Zero-Inverted... |
| 6788787 |
Pseudorandom number generator, stream encryption method, and stream encrypting communication method |
| Sep-7-2004 |
A chaos-generating loop includes a one dimensional mapping circuit (13) with non-linear input-output characteristics for generating chaos, a linear or non-linear AD converter (15) for converting an analog... |
| 6760438 |
System and method for Viterbi decoding on encrypted data |
| Jul-6-2004 |
A system and method for Viterbi decoding on encrypted data is disclosed. At the receiver, maximum likelihood decoding is performed based on received input in the encryption domain. When selecting a path... |
| 6754345 |
Pseudorandom number generation circuit and data communication system employing the same |
| Jun-22-2004 |
A pseudorandom number generation circuit 2 whose generation timings of pseudorandom numbers vary randomly is disclosed. The pseudorandom number generation circuit 2 includes a clock generation circuit... |
| 6744893 |
Receiver estimation engine for a chaotic system |
| Jun-1-2004 |
A chaotic receiver estimation engine and method of use. The estimation engine synchronizes and recovers data and performs its decision and tracking processes by mapping probability calculation results... |
| 6707914 |
System and method for encrypting information within a communications network |
| Mar-16-2004 |
Within a communications system, first and second end stations coupled to a network participate in a communications session with one another using the network. Each end station includes an encryptor having... |
| 6701434 |
Efficient hybrid public key signature scheme |
| Mar-2-2004 |
Methods, apparatus and computer products provide solutions to the problem caused by the slow speed of public key signature algorithms. The solutions also solve problems of packet authentication for multicast... |
| 6687376 |
High-speed long code generation with arbitrary delay |
| Feb-3-2004 |
A circuit is designed with a first register circuit (364) arranged to store a state matrix. A memory circuit (710) is arranged to store a plurality of addressable matrices. A control circuit (700) is coupled... |
| 6668352 |
Distortion compensating device and method in a multi-code mobile communication system |
| Dec-23-2003 |
A receiving device in a multi-code mobile communication system is disclosed. In the multi-code mobile communication system, user serial data is broken down into a plurality of parallel data channels and... |
| 6658566 |
Process for storage and use of sensitive information in a security module and the associated security module |
| Dec-2-2003 |
The invention relates to a process for storing and using sensitive information in a security module and to a security module arranged to implement the process, and protect the sensitive information against... |
| 6654883 |
Device authentication and encrypted communication system offering increased security |
| Nov-25-2003 |
A system composed of a plurality of user devices, each storing unique secret information, a system device and a control unit. The control unit produces key capsule data by performing a digital signature... |
| 6631166 |
Method and apparatus for signal generation and detection using unstable periodic chaotic orbits |
| Oct-7-2003 |
A signal generator and signal receiver, as well as method of signal generation and transmission, in which selected unstable periodic orbits of a lossy chaotic system are identified and extracted, and portions... |
| 6603857 |
Method and apparatus for controlling release of time sensitive information |
| Aug-5-2003 |
A method and apparatus for controlling release of time-sensitive information is accomplished by a server that establishes access information for a specific future time which only becomes active once the... |
| 6598162 |
Method for combining transfer functions with predetermined key creation |
| Jul-22-2003 |
A method for combining transfer functions with predetermined key creation. In one embodiment, digital information, including a digital sample and format information, is protected by identifying and encoding... |
| 6591367 |
Method and apparatus for preventing unauthorized copying and distributing of electronic messages transmitted over a network |
| Jul-8-2003 |
A method and apparatus for providing protection from unauthorized use of messages received by a system is described. The receiving system can receive a message from a sending system, for example, over... |
| 6587948 |
Recording apparatus, recording medium, playback apparatus, recording method and playback method |
| Jul-1-2003 |
A recording method and a recording apparatus whereby digital data is recorded onto a disc as run-length limited code used for modulating marks or spaces on the disc and, at the same time, the recorded... |
| 6560338 |
Limiting delays associated with the generation of encryption stream ciphers |
| May-6-2003 |
A method and an apparatus for generating encryption stream ciphers are based on a recurrence relation designed to operate over finite fields larger than GF(2). A non-linear output can be obtained by using... |
| 6543022 |
Method and apparatus to encode digital signals |
| Apr-1-2003 |
A circuit includes terminals to receive data bits and terminals to receive pseudo-random bits. The circuit further includes circuit elements each combining at least one data bit with at least one pseudo-random... |
| 6510228 |
Method and apparatus for generating encryption stream ciphers |
| Jan-21-2003 |
A method and apparatus for generating encryption stream ciphers. The recurrence relation is designed to operate over finite fields larger than GF(2). The linear feedback shift register used to implement... |
| 6490357 |
Method and apparatus for generating encryption stream ciphers |
| Dec-3-2002 |
A method and an apparatus for generating encryption stream ciphers are based on a recurrence relation designed to operate over finite fields larger than GF(2). A non-linear output can be obtained by using... |
| 6490354 |
Lightweight word-oriented technique for generating a pseudo-random sequence for use in a keystream of a stream cipher |
| Dec-3-2002 |
A word-oriented technique for generating a pseudo-random sequence, e.g., a keystream (17) for use in a stream cipher. Specifically, the technique utilizes two different arrays (653, 657) with each array... |
| 6477251 |
Apparatus and method for securely determining an outcome from multiple random event generators |
| Nov-5-2002 |
An apparatus includes a first processor, a second processor and a communications path therebetween. The first processor has a random event generator for generating the first event of a multiple-part event... |
| 6445794 |
System and method for synchronizing one time pad encryption keys for secure communication and access control |
| Sep-3-2002 |
A method for generating an identical electronic one-time pad at a first location and a second location, the method comprising the steps of: (a) providing a first electronic device at the first location... |
| 6438230 |
Data mapping method and apparatus with multi-party capability |
| Aug-20-2002 |
Mapping or encryption of a message made up of characters from a character set is provided. Each character in the character set is associated with one or more disjoint real number intervals. Each character... |
| 6424953 |
Encrypting secrets in a file for an electronic micro-commerce system |
| Jul-23-2002 |
An electronic commerce system and method includes a broker computer system having a database of scrips, a vendor computer, and a consumer computer system having a wallet protected by a pass phrase. To... |
| 6370248 |
Synchronizing autonomous chaotic systems using filters |
| Apr-9-2002 |
A system for synchronizing chaotic transmitters and receivers that is less sensitive to channel effects than other known chaotic communication methods. The system employs duplicate transmitter and receiving... |
| 6353669 |
Method and apparatus that processes a video signal to generate a random number generator seed |
| Mar-5-2002 |
A method and apparatus processes a video image signal to generate one or more random number generator seeds. Preferably, the video image signal represents a scene that is both unpredictable and "live".... |
| 6351539 |
Cipher mixer with random number generator |
| Feb-26-2002 |
An encryption device has a random number generator whose output is combined by exclusive-or with plaintext input which has been encrypted by a first block cipher. The combined exclusive-or output is encrypted... |
| 6345098 |
Method, system and apparatus for improved reliability in generating secret cryptographic variables |
| Feb-5-2002 |
A method, system and apparatus are described which utilize a trusted third party, or Certification Authority (CA) in the generation of a reliable seed to be used in the generation of prime numbers used... |
| 6339645 |
Pseudo-random sequence generator and associated method |
| Jan-15-2002 |
A method, and associated apparatus, for generating a pseudo-random number sequence. Determinations are made of compatible configurations of windmill generators for a selected windmill polynomial. Implementation... |
| 6327661 |
Using unpredictable information to minimize leakage from smartcards and other cryptosystems |
| Dec-4-2001 |
Methods and apparatuses are disclosed for securing cryptosystems against external monitoring attacks by reducing the amount (and signal to noise ratio) of useful information leaked during processing. This... |
| 6307938 |
Method, system and apparatus for generating self-validating prime numbers |
| Oct-23-2001 |
A method, system and apparatus for generating primes (p and q) for use in cryptography from secret random numbers and an initialization value whereby the initial secret random numbers are encoded into... |
| 6304972 |
Secure software system and related techniques |
| Oct-16-2001 |
A secure software system includes a transformation processor for transforming an original program capable of being executed on a lessee site into a vendor server program, a first program intended to be... |
| 6301361 |
Encoding and decoding information using randomization with an alphabet of high dimensionality |
| Oct-9-2001 |
A method for encoding a set of initial symbols from a plurality of elemental symbols. The method generates for each symbol from the set of initial symbols, a first parameter representing a number of intervals... |
| 6289296 |
Statistical simulation method and corresponding simulation system responsive to a storing medium in which statistical simulation program is recorded |
| Sep-11-2001 |
A method for simulating a stochastic phenomenon, particularly one employing a Monte Carlo method, includes a step for generating random numbers having a nonuniform density function .rho.(x) based on an... |
| 6282292 |
Amplitude insensitive synchronization of nonlinear systems |
| Aug-28-2001 |
An amplitude insensitive synchronized nonlinear system (AISN) that allows communication between nonlinear systems operating in the chaotic realm which is insensitive to attenuation or signal noise affecting... |
