| 6408075 |
Information processing equipment and IC card |
| Jun-18-2002 |
An IC card having a storage memory including a program storage unit for storing a program and a data storage unit for storing data and a central processing unit for executing a predetermined process in... |
| 6404890 |
Generating RSA moduli including a predetermined portion |
| Jun-11-2002 |
Techniques are provided for generation of an RSA modulus having a predetermined portion. The predetermined portion may be the leading digits of the modulus, or split between the leading and trailing digits... |
| 6401207 |
Security device for vehicle |
| Jun-4-2002 |
A security device for vehicle disclosed is of a type generating a seed that is used suitably in order to generate a key by being encoded and that is decreased in regularity. Namely, the security device... |
| 6385319 |
Encoding circuit and method of detecting block code boundary and establishing synchronization between scrambler and descrambler |
| May-7-2002 |
The present invention comprises the bus reset detection circuit 6 detecting a bus reset signal from the network initiation/control state machine, the bus reset identification code generation circuit 8... |
| 6377690 |
Safe transmission of broadband data messages |
| Apr-23-2002 |
An arrangement for providing secure transmission of information. The bulk of the information is transmitted over non-secure channels such as broadcast media which terminate on a plurality of receiving... |
| 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... |
| 6345101 |
Cryptographic method and apparatus for data communication and storage |
| Feb-5-2002 |
The disclosed invention is a new cryptographic method which is fast and ideally suited for secure, high volume data communication and storage. The data is encrypted at the source using a private key and... |
| 6334189 |
Use of pseudocode to protect software from unauthorized use |
| Dec-25-2001 |
Three methods are disclosed for protecting software applications from unauthorized distribution and use (piracy). The first method involves using values generated by a conventional ESD (Electronic Security... |
| 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... |
| 6286103 |
Method and apparatus for encrypted data stream transmission |
| Sep-4-2001 |
A method and apparatus for the transmission and reception of scrambled data is disclosed. In some embodiments, the method and apparatus includes transmitting a scrambled data stream to a decoder, sending... |
| 6272225 |
Key recovery condition encryption and decryption apparatuses |
| Aug-7-2001 |
A key recovery condition encryption apparatus includes a hashing unit, a first concatenating unit, and a condition information encryption unit. The hashing unit calculates a hash value on the basis of... |
| 6269164 |
Method of and system for encrypting messages |
| Jul-31-2001 |
A technique for encrypting and decrypting a data message is described herein and includes a stream cipher, a block cipher and a key generation embodiment which use a process of Summary Reduction. This... |
| 6266429 |
Method for confirming the integrity of an image transmitted with a loss |
| Jul-24-2001 |
A digital image is divided into a plurality of cells having a first sequence. A random seed is generated and used to produce two sets of pseudo-random numbers. The first set of pseudo-random numbers are... |
| 6243811 |
Method for updating secret shared data in a wireless communication system |
| Jun-5-2001 |
In the method for updating secret shared data (SSD) in a wireless communication system, a first party outputs a first random number as a first challenge wherein the first party is one of a network and... |
| 6240184 |
Password synchronization |
| May-29-2001 |
A system, method, and data structure provide for securely synchronizing passwords and/or other information between systems. The password-related information is stored in the systems in a secure manner,... |
| 6233579 |
Method for storing data |
| May-15-2001 |
In order to make available a method for storing data in the form of a plurality of data sequences on a plurality of data carriers, which makes possible a restoration of data which is as reliable and simple... |
| 6219423 |
System and method for digitally signing a digital agreement between remotely located nodes |
| Apr-17-2001 |
A digital arbitration system comprising a server node and at least one signatory node coupled together through a communication link. Each of the signatory node(s) may be configured with a unique private... |
| 6212639 |
Encryption of configuration stream |
| Apr-3-2001 |
A method of communicating encrypted configuration data between a programmable logic device (PLD) and a storage device is included in one part of the invention. The method includes the following steps.... |
| 6209102 |
Method and apparatus for secure entry of access codes in a computer environment |
| Mar-27-2001 |
A user inputting his access code (e.g., PIN or password) into an computing environment to access a transaction is at risk of losing the access code to an attacker who has physical or electronic access... |
| 6201870 |
Pseudorandom noise sequence generator |
| Mar-13-2001 |
A pseudorandom sequence generator including a first feedback shift register having at least one input and at least one output and a first controller having an output in communication with the at least... |
| 6157720 |
Method and apparatus for encrypting data |
| Dec-5-2000 |
In the process of compressing and encrypting data, without increase of a processing time, a cipher capability is secured against the latest cryptanalysis such as differential and linear cryptanalyses.... |
| 6151676 |
Administration and utilization of secret fresh random numbers in a networked environment |
| Nov-21-2000 |
In a public key cryptosystem employing the El-Gamal algorithm, secret fresh random numbers are generated at a server and private keys of users, as encrypted with a symmetric algorithm by using individual... |
| 6128390 |
Data processor for FM multiplex broadcast |
| Oct-3-2000 |
A second random number generator (102) sets a scramble key data included in a transmitted/received data to an initial value, and it generates predetermined second random numbers. A first random number... |
| 6088456 |
Data encryption technique |
| Jul-11-2000 |
A method of encrypting data is described in which a random variable (6A-6D) is generated in binary digital form. A first set of data (8A-8J) representing a plaintext message in binary digital form is combined... |
| 6081600 |
Method and apparatus for signaling privacy in personal communications systems |
| Jun-27-2000 |
A system and method provides signaling privacy for communications between nodes of a communications network (30). Multiple logical links exist between distinct network nodes (38-40, 42, 50-53) of the communication... |
| 6076078 |
Anonymous certified delivery |
| Jun-13-2000 |
A number of fault-tolerant methods for purchasing digital goods with a digital token over a network in which the token's value resides either with a customer or a merchant are disclosed. One version of... |
| 6075864 |
Method of establishing secure, digitally signed communications using an encryption key based on a blocking set cryptosystem |
| Jun-13-2000 |
The encryption key based on a blocking set cryptosystem includes knowledge of the blocking set, and ciphers (usually independent) on the blocking set and its complement. In order to decipher, a legitimate... |
| 6069954 |
Cryptographic data integrity with serial bit processing and pseudo-random generators |
| May-30-2000 |
A new structure for a secret key cryptography algorithm uses double exclusive-or (XOR) encryption (e.sub.i =k1.sub.i XOR m.sub.i XOR k2.sub.1), analogue to a stream cipher arrangement, but providing data... |
| 6047069 |
Method and apparatus for preserving error correction capabilities during data encryption/decryption |
| Apr-4-2000 |
A data encryption/decryption system encrypts data and its associated redundancy bytes while retaining the error correction capabilities of the original data. The error correction function can then be removed,... |
| 6038321 |
Data transfer method, communication system and storage medium |
| Mar-14-2000 |
In a communication system, a transmitter device encrypts variable-length data having a data length corresponding to a kind of information to be transferred or a communication capacity, using a natural... |
| 6028934 |
TD multiplexing digital video signals with scramble of scrambling stages more than one greater in number than the video signals |
| Feb-22-2000 |
For supply to a time division multiplexer for multiplexing a predetermined number of digital multiplexer input signals bit by bit into a multiplexed signal in which a long pathological pattern is suppressed... |
| 5999566 |
Method and apparatus for providing error-tolerant communication of information |
| Dec-7-1999 |
The device and method according to the present invention permute the order of signals representing information intended for transmission over a communication medium. The signal ordering is permuted prior... |
| 5984521 |
Method and apparatus for generating descrambling data for CD-ROM decoder |
| Nov-16-1999 |
Descrambled data is generated for a CD-ROM decoder and a descrambler. A lower first through fifteenth bits of the descrambled data are generated according to an equation DSCR.sub.0 [x]=DSCR.sub.-1 [x+2].sym.DSCR.sub.-1... |
| 5978486 |
Data scrambling method, data scrambling apparatus, data descrambling method, and data descrambling apparatus |
| Nov-2-1999 |
A data scrambling method, defined by data polynomial, D(X)=d.sub.n X.sup.n +d.sub.n-1 X.sup.n-1 +d.sub.n-2 X.sup.n-2 + . . . +d.sub.2 X.sup.2 +d.sub.1 X.sup.1 +d.sub.0 X.sup.0 generating polynomial, G(X)=1+g.sub.-1... |
| 5966447 |
Data scrambling method, data scrambling apparatus, data descrambling method, and data descrambling apparatus |
| Oct-12-1999 |
A method and apparatus for descrambling data that is characterized by shift registers that realize an operation of generating polynomial and that have a ring-shaped structure that realizes plural and continuous... |
| 5894517 |
High-speed backplane bus with low RF radiation |
| Apr-13-1999 |
A method and apparatus for substantially reducing electromagnetic radiation from a backplane used to interconnect multiple communication modules. Data signals to be transmitted onto the backplane are first... |
| 5881154 |
Data scramble transmission system |
| Mar-9-1999 |
A data scramble transmission system with a data transmission link coupled between sending and receiving ends is provided. The link adopts transmission frames each of which is constituted by data and control... |
| 5854840 |
Data transmission protocol method and apparatus |
| Dec-29-1998 |
A data communications protocol for single path media having low data error rate requires the generation of a data packet with a start code field having a predetermined pattern, a byte count field for defining... |
| 5844989 |
Data scrambling method, data scrambling apparatus, data descrambling method, and data descrambling apparatus |
| Dec-1-1998 |
A method and apparatus for descrambling data that is characterized by shift registers that realize an operation of generating polynomial and that have a ring-shaped structure that realizes plural and continuous... |
| 5835602 |
Self-synchronous packet scrambler |
| Nov-10-1998 |
A digital data transmission system of a type that uses NRZ line coding, comprising apparatus for generating data sequences comprising at least flag sequences and packet data, a frame generator for assembling... |
| 5745522 |
Randomizer for byte-wise scrambling of data |
| Apr-28-1998 |
An N-bit, byte-wise data randomizer uses a linear feedback shift register arrangement where each register stage stores N-bits. In this manner, a pseudorandom sequence can be generated based on a nonbinary... |
| 5742679 |
Optimized simultaneous audio and data transmission using QADM with phase randomization |
| Apr-21-1998 |
An subsystem processor for converting an input audio signal to complex audio samples for QADM processing by a modem for communication with a remote modem is disclosed. The audio process comprises a decorrelator... |
| 5561714 |
Scrambling system for serial digital video |
| Oct-1-1996 |
An improved scrambler for serial digital video that is compatible with SMPTE Standard 259M inserts a detector/dithering circuit between the input serial digital signal and a scrambler. The scrambler's... |
| 5530959 |
Self-synchronizing scrambler/descrambler without error multiplication |
| Jun-25-1996 |
A self-synchronizing scrambler/descrambler arrangement operates in two modes. In the first, or start-up mode, predetermined data is coupled to the scrambler and transmitted to the descrambler. This data... |
| 5488663 |
Encoding methods for generating a digital signal containing modulated bit allocation information, and record carriers containing that signal |
| Jan-30-1996 |
Transmission system for transmitting and receiving, and subband encoding methods for generating for transmission, digital signals containing modulated bit allocation information; and record carriers containing... |
| 5473696 |
Method and apparatus for combined encryption and scrambling of information on a shared medium network |
| Dec-5-1995 |
An improved method and apparatus for encrypting and scrambling information cells transmitted on a telephone system local loop from a central office to a plurality of user premises networks via a shared... |
| 5448640 |
Parallel distributed sample descrambling circuit for cell-based asynchronous transfer mode physical layer |
| Sep-5-1995 |
A parallel distributed sample descrambler part for a cell-based ATM physical layer, comprising a PRBS generator for generating an 8-bit random number when being set to any value other than "0" in response... |
| 5422919 |
EMI suppression coding |
| Jun-6-1995 |
EMI suppression technique that pseudorandomizes the positive or negative going transitions that are used to represent one binary state in a transmitted digital signal such as in MLT-3 data format. By pseudorandomizing... |
| 5410600 |
Pre-scramble encoding method and apparatus for digital communication |
| Apr-25-1995 |
A prescramble encoding mechanism divides a data word into a plurality of sequences of data bits for transmission over a fiber optic communication link. Complementary versions of control bits and odd and... |
| 5377265 |
Parallel additive scrambler and descrambler |
| Dec-27-1994 |
Parallel working additive scramblers produce a predetermined pseudorandom sequence of length L in a word generator, which consists of an N-stage shift register. To obtain more than N parallel located pseudorandom... |
