| 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) |
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| 05/20/1999 | WO1999025091A1 Apparatus, and associated method, for generating a pseudo-random number |
| 05/20/1999 | WO1999025090A1 Method for identifying proprietary data of traitors |
| 05/20/1999 | WO1999025071A2 Distributed service network |
| 05/19/1999 | EP0917327A1 Method and system for performing electronic money transactions |
| 05/19/1999 | EP0916209A1 Cryptographic key recovery system |
| 05/19/1999 | EP0916208A1 Accelerating public-key cryptography by precomputing randomly generated pairs |
| 05/18/1999 | CA2151851C Methods for providing secure access to shared information |
| 05/14/1999 | WO1999023781A1 Signature verification for elgamal schemes |
| 05/14/1999 | WO1998054864A3 Auto-recoverable auto-certifiable cryptosystems |
| 05/14/1999 | CA2306468A1 Signature verification for elgamal schemes |
| 05/12/1999 | EP0915590A2 Method and system for secure lightweight transactions in wireless data networks |
| 05/12/1999 | EP0914635A1 Authentication system |
| 05/11/1999 | US5903882 Reliance server for electronic transaction system |
| 05/06/1999 | WO1999022486A1 Method for digital signing of a message |
| 05/06/1999 | WO1999022485A1 Virtual matrix encryption (vme) and virtual key cryptographic method and apparatus |
| 05/06/1999 | EP0912920A1 System for secure data storage on cd-rom |
| 05/06/1999 | CA2307234A1 Virtual matrix encryption (vme) and virtual key cryptographic method and apparatus |
| 05/05/1999 | CN1215950A Information signal recording/reproducing system and information signal recording/reproducing process |
| 05/04/1999 | CA2149688C Pre-location of authentication information in a personal communication system |
| 04/29/1999 | WO1999021320A1 Accelerated signature verification on an elliptic curve |
| 04/28/1999 | EP0910923A1 Enhanced short message and method for synchronising and ensuring security of enhanced short messages exchanged in a cellular radio communication system |
| 04/28/1999 | EP0721718A4 Method and apparatus for authentication in a communication system |
| 04/28/1999 | CN1215518A Remote proxy system and method |
| 04/28/1999 | CN1215271A One way data converter and machine identification system |
| 04/27/1999 | US5898156 Validation stamps for electronic signatures |
| 04/27/1999 | CA2087616C Encryption system for digital cellular communications |
| 04/22/1999 | WO1999020018A1 Novel digital cryptography method by selector box |
| 04/22/1999 | CA2274938A1 Novel digital cryptography method by selector box |
| 04/21/1999 | EP0910197A2 Methods and apparatus for a computer network firewall with dynamic rule processing |
| 04/21/1999 | EP0910028A1 Personal electronic settlement system, its terminal, and management apparatus |
| 04/21/1999 | EP0909495A1 Public key cryptography method |
| 04/21/1999 | EP0909494A1 Method and apparatus for a cryptographically-assisted commercial network system designed to facilitate and support expert-based commerce |
| 04/21/1999 | EP0909434A2 Method and device for loading input data into an algorithm during authentication |
| 04/21/1999 | EP0909433A1 Method for performing a double-signature secure electronic transaction |
| 04/21/1999 | CN1214583A 电子商务系统 E-commerce system |
| 04/15/1999 | WO1999018729A1 Method and apparatus for encrypted data stream transmission |
| 04/15/1999 | WO1999018506A1 Method and apparatus for targeting a digital information playback device |
| 04/15/1999 | WO1999008415A3 System for generating electronic signatures in absolute security |
| 04/15/1999 | WO1999007104B1 Data security in multipoint publish/subscribe communications |
| 04/15/1999 | CA2305644A1 Method and apparatus for encrypted data stream transmission |
| 04/14/1999 | EP0909075A1 Methods and apparatus for a computer network firewall with cache query processing |
| 04/14/1999 | EP0909074A1 Methods and apparatus for a computer network firewall with multiple domain support |
| 04/14/1999 | EP0909073A2 Methods and apparatus for a computer network firewall with proxy reflection |
| 04/14/1999 | EP0909055A2 Pseudo-random number generating method and apparatus therefor |
| 04/14/1999 | EP0907935A1 A system and method for secure network electronic payment and credit collection |
| 04/14/1999 | EP0800691B1 Method for implementing a private key communication protocol between two processing devices |
| 04/07/1999 | EP0907269A1 Encryption device for information in binary code |
| 04/07/1999 | EP0907120A2 Method amd apparatus for delivering documents over an electronic network |
| 04/07/1999 | EP0906679A1 Apparatus and method for secure commmunication based on channel characteristics |
| 04/07/1999 | EP0906678A1 Improved cryptographically secure pseudo-random bit generator for fast and secure encryption |
| 04/07/1999 | EP0815526A4 Deferred billing, broadcast, electronic document distribution system and method |
| 04/06/1999 | USRE36181 Pseudorandom number generation and crytographic authentication |
| 04/01/1999 | WO1999016209A1 Method and system for transient key digital time stamps |
| 04/01/1999 | WO1999016205A1 Method and system of dynamic transformation of encrypted material |
| 04/01/1999 | WO1999015970A1 Method and apparatus for protection of recorded digital data |
| 04/01/1999 | WO1999007145A8 Verification of the source of program of information in a conditional access system |
| 04/01/1999 | CA2304148A1 Method and apparatus for protection of recorded digital data |
| 03/31/1999 | EP0905942A2 Decrypting device |
| 03/31/1999 | EP0905611A2 Pseudorandom number generating method and pseudorandom number generator |
| 03/31/1999 | EP0836731B1 Value transfer system |
| 03/31/1999 | CN1212773A Personal electronic settlement system, its terminal, and management apparatus |
| 03/30/1999 | US5889861 Identity confidentiality method in radio communication system |
| 03/30/1999 | US5889860 Encryption system with transaction coded decryption key |
| 03/30/1999 | US5889270 Bar code decoding using moving averages to break the (N.K.) code barrier for UPC, EAN, code 128 and others |
| 03/30/1999 | US5889266 Data transfer system having a terminal and a portable data carrier configuration and method for recharging the portable data carrier configuration using the terminal |
| 03/30/1999 | CA2157011C Method for two-way public key authentication and key agreement for low-cost terminals |
| 03/25/1999 | WO1999014880A2 A method and device for executing a decrypting mechanism through calculating a standardized modular exponentiation for thwarting timing attacks |
| 03/25/1999 | WO1999014652A1 Encrypting file system and method |
| 03/24/1999 | EP0903904A2 Network system, data distribution method, and recording medium on which distribution use data is recorded |
| 03/24/1999 | EP0903887A2 Cellular telephony authentication arrangement |
| 03/24/1999 | EP0903665A2 Physical random number generator, method of generating physical random numbers and physical random number storing medium |
| 03/24/1999 | EP0903026A1 Process for cryptographic code management between a first computer unit and a second computer unit |
| 03/24/1999 | EP0704124A4 A cryptographic method |
| 03/24/1999 | CN1211776A 通信系统和通信方法 A communication system and a communication method |
| 03/24/1999 | CA2247910A1 Pseudorandom number generating method and pseudorandom number generator |
| 03/23/1999 | CA2165874C Method for secure session key generation |
| 03/18/1999 | WO1999013613A1 Tamper resistant methods and apparatus |
| 03/18/1999 | WO1999013611A1 Data dissemination system for computer networks |
| 03/18/1999 | WO1999013415A1 A digital trust center for medical image authentication |
| 03/18/1999 | CA2302183A1 Data dissemination system for computer networks |
| 03/16/1999 | US5883960 Method of mobile unit registration and method of IC card registration for mobile communications system, and mobile unit, IC card, and IC card insertion type mobile unit implementing such methods |
| 03/16/1999 | CA2149744C Protected distribution protocol for keying and certificate material |
| 03/11/1999 | WO1999012143A2 Device for storing codes |
| 03/03/1999 | EP0899907A2 Apparatus for processing bivectors and encrypting system including the same |
| 03/03/1999 | EP0899733A1 Optical disc copy management system |
| 03/03/1999 | EP0898777A2 Cryptographic methods, apparatus and systems for storage media electronic rights management in closed and connected appliances |
| 03/02/1999 | US5878135 Decoding system for processing encrypted broadcast, cable or satellite video data |
| 03/02/1999 | CA2145926C Method and apparatus for enabling trial period use of software products: method and apparatus for generating a machine-dependent identification |
| 02/28/1999 | CA2245427A1 Information signal recording/reproducing system, information signal recording device, information signal reproducing device and information signal recording/reproducing process |
| 02/24/1999 | EP0898216A2 Method for securely communicating remote control commands in a computer network |
| 02/24/1999 | CN1208925A Device, method and recording medium for preventing non-authorized data copying having secret code copying manager information |
| 02/23/1999 | US5875247 System for decrypting encrypted software |
| 02/23/1999 | CA2124891C Process for authentifying a portable object by an off-line terminal and portable object and terminal using said process |
| 02/23/1999 | CA2120294C Method and device for calculating computer file signatures |
| 02/18/1999 | WO1999008415A2 System for generating electronic signatures in absolute security |
| 02/17/1999 | EP0686328B1 Digital dictation system with protection against unauthorised listening-in |
| 02/16/1999 | US5872849 Method for secure communication in a system |
| 02/16/1999 | US5872846 System and method for providing security in data communication systems |
| 02/16/1999 | CA2137065C Method of protecting electronically published materials using cryptographic protocols |
| 02/11/1999 | WO1999007151A1 Mechanism and apparatus for encapsulation of entitlement authorization in conditional access system |