Patents
Sitemap › G09 - Educating; Cryptography; Display; Advertising; Seals › G09C - Ciphering or deciphering apparatus for cryptographic or other purposes involving the need for secrecy › G09C 1 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
Patents for G09C 1 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system (12,544)
12/1998
12/08/1998US5848162 Data acquiring apparatus
12/08/1998US5848159 Public key cryptographic apparatus and method
12/08/1998US5848158 Data copyright management system
12/08/1998US5848156 Communication method and apparatus for carrying out cipher communications telephonically
12/08/1998CA2145925C Method and apparatus for enabling trial period use of software products: method and apparatus for allowing a try-and-buy user interaction
12/03/1998WO1998054864A2 Auto-recoverable auto-certifiable cryptosystems
12/03/1998WO1998054687A1 Cipher processor, ic card and cipher processing method
12/03/1998WO1998054633A1 Method and apparatus for signing and sealing objects
12/03/1998CA2290952A1 Auto-recoverable auto-certifiable cryptosystems
12/02/1998EP0880839A1 System for authenticating the location of remote users
12/02/1998EP0772929A4 Methods and systems for creating and authenticating unalterable self-verifying articles
12/02/1998CN1200523A Numerical anti-counterfeit method and products therefor
12/01/1998US5845281 Method and system for managing a data object so as to comply with predetermined conditions for usage
11/1998
11/26/1998WO1998032306A3 Method and apparatus for providing authentication security in a wireless communication system
11/25/1998EP0880254A2 Security system and method for financial institution server and client web browser
11/25/1998EP0880088A2 Data copyright management system and apparatus
11/25/1998EP0722640B1 Cryptographic receiver
11/25/1998EP0717895B1 Key distribution in a multiple access network using quantum cryptography
11/24/1998US5841870 Dynamic classes of service for an international cryptography framework
11/24/1998US5841869 Method and apparatus for trusted processing
11/24/1998US5841865 Enhanced cryptographic system and method with key escrow feature
11/24/1998CA2140803C Method of authenticating a terminal in a transaction execution system
11/24/1998CA2134410C Symmetric cryptographic system for data encryption
11/19/1998WO1998052162A2 Secure multiple application card system and process
11/19/1998WO1998052161A2 Key transformation unit for an ic card
11/19/1998WO1998052151A1 Electronic transaction
11/18/1998EP0877979A1 Co-processor for performing modular multiplication
11/18/1998CN1199205A Terminal device and terminal system
11/17/1998US5839119 Method of electronic payments that prevents double-spending
11/17/1998US5838791 Encoder and decoder
11/17/1998US5838251 Method and device for programming operating data into vehicle components
11/17/1998CA2148105C Method and apparatus for authentication of client server communication
11/12/1998WO1998051038A1 Pseudo-random generator based on a hash coding function for cryptographic systems requiring random drawing
11/12/1998WO1998050894A1 System for secured reading and processing of data on intelligent data carriers
11/12/1998WO1998050851A1 Improved apparatus & method for modular multiplication & exponentiation based on montgomery multiplication
11/12/1998DE19718547A1 System zum gesicherten Lesen und Bearbeiten von Daten auf intelligenten Datenträgern System for securely reading and editing of data on intelligent data carriers
11/12/1998CA2288767A1 Pseudo-random generator based on a hash coding function for cryptographic systems requiring random drawing
11/11/1998EP0876722A1 Secure anonymous information exchange in a network
11/10/1998US5835599 Muti-cycle non-parallel data encryption engine
11/10/1998US5835597 Software-efficient pseudorandom function and the use thereof for decryption
11/10/1998US5835595 Method and apparatus for crytographically protecting data
11/10/1998US5835588 Digital dictation system with protection against unauthorized listening-in
11/05/1998WO1998049804A1 Optimal-resilience, proactive, public-key cryptographic system and method
11/05/1998CA2286732A1 Optimal-resilience, proactive, public-key cryptographic system and method
11/04/1998EP0876028A2 A method for publicly verifiable recovery of Diffie-Hellman, RSA and Rabin related asymmetrical encryption
11/04/1998EP0876027A2 Method and apparatus for achieving perfect forward secrecy in closed user groups
11/04/1998EP0876026A2 Programmable crypto processing system and method
11/04/1998EP0875871A2 Authorization method in data transfer systems
11/04/1998EP0875813A2 Enciphering, deciphering and information processing apparatus and methods
11/04/1998EP0875047A2 Telecommunications system
11/04/1998CN1198278A Method for encryption of information
11/04/1998CN1198233A Method, apparatus, system and firmware for secure transactions
11/03/1998US5832092 Communication system based on shared cipher key, server unit for the same system, client unit for the same system, and method of sharing cipher key in communication system
11/03/1998US5832087 Apparatus for generating encryption/decryption look-up tables using a session key
11/03/1998US5832083 Method and device for utilizing data content
10/1998
10/29/1998WO1998048345A1 Arithmetic processor
10/29/1998CA2286647A1 Arithmetic processor
10/28/1998CA2235848A1 A method for publicly verifiable recovery of diffie-hellman, rsa and rabin related asymmetrical encryption
10/27/1998US5828754 Method of inhibiting copying of digital data
10/27/1998US5828752 Pseudo-random number generator and communication system employing the same
10/27/1998CA2109554C Secure document and method and apparatus for producing and authenticating same
10/22/1998WO1998047264A1 Method and system for producing and checking a hash total for digital data grouped in several data segments
10/21/1998EP0872977A2 System and method for efficiently implementing an authenticated communications channel that facilitates tamper detection
10/21/1998EP0872976A1 Method for quickly generating successive pseudorandom numbers
10/21/1998EP0872975A2 Method for the adaptive synchronization of chaotic systems and data transmission system using said method
10/21/1998EP0872798A1 Computer memory organization
10/21/1998EP0872795A1 High speed modular exponentiator
10/21/1998EP0872097A1 Secured gateway interface
10/21/1998EP0872080A1 Multi-step digital signature method and system
10/21/1998EP0872079A2 A multi-purpose high speed cryptographically secure sequence generator based on zeta one-way functions
10/21/1998EP0872078A1 Method for encryption of information
10/21/1998EP0872077A1 Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers
10/21/1998EP0872076A1 Process for the computer-controlled exchange of cryptographic keys between a first and a second computer unit
10/21/1998EP0872075A1 Wireless transaction and information system
10/21/1998EP0872064A1 Key escrow method with warrant bounds
10/20/1998US5826029 Secured gateway interface
10/20/1998US5825886 Construction symmetric ciphers using the cast design procedure
10/20/1998US5825885 Personal certification system
10/20/1998US5825884 Method and apparatus for operating a transactional server in a proprietary database environment
10/20/1998US5825300 Method of protected distribution of keying and certificate material
10/14/1998EP0871152A1 Device for encrypted notation of numerical codes
10/14/1998EP0870382A1 Application level security system and method
10/14/1998EP0870380A1 System and method for access control for data storage media
10/14/1998EP0870272A1 Reader using moving averages to break the (n,k) code barrier for upc, ean, and others
10/14/1998CN1195936A Method of generating random number from radio signal
10/14/1998CN1195827A Apparatus and method for accessing secured data stored in portable data carrier
10/14/1998CN1195807A 口令处理设备及其方法 Password processing apparatus and method
10/08/1998WO1998044678A1 Encryption device for information in binary code
10/08/1998WO1998044676A1 A peripheral device preventing post-scan modification
10/08/1998WO1998020672A3 Method and apparatus for imprinting id information into a digital content and for reading out the same
10/07/1998EP0869653A1 Simultaneous bi-directional translation and sending of EDI service order data
10/07/1998EP0869652A2 Document delivery system
10/07/1998EP0869635A2 Encrypted data recovery method using split storage key and system thereof
10/06/1998US5818933 Copyright control system
10/01/1998WO1998043437A1 Method of and apparatus for transmitting data for interactive tv applications
10/01/1998WO1998043433A1 Data processing system
10/01/1998WO1998043432A1 Transmission and reception of television programmes and other data
10/01/1998WO1998043431A1 Method of downloading of data to an mpeg receiver/decoder and mpeg transmission system for implementing the same
10/01/1998WO1998043430A1 Signal generation and broadcasting
10/01/1998WO1998043428A1 Method and apparatus for preventing fraudulent access in a conditional access system
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