| 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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| 02/11/1999 | WO1999007150A1 Encryption devices for use in a conditional access system |
| 02/11/1999 | WO1999007149A1 Source authentication of download information in a conditional access system |
| 02/11/1999 | WO1999007148A1 Authorization of services in a conditional access system |
| 02/11/1999 | WO1999007145A1 Verification of the source of program of information in a conditional access system |
| 02/11/1999 | WO1999007104A1 Data security in multipoint publish/subscribe communications |
| 02/11/1999 | WO1999007103A1 Methods and apparatus for enhanced cmea employing enhanced transformations |
| 02/11/1999 | CA2299505A1 Data security in multipoint publish/subscribe communications |
| 02/11/1999 | CA2266665A1 Methods and apparatus for enhanced cmea employing enhanced transformations |
| 02/10/1999 | EP0896453A2 Method for encrypting or decrypting a data stream |
| 02/10/1999 | EP0896451A2 Encryption apparatus and computer-readable recording medium containing program for realizing the same |
| 02/10/1999 | CN1207533A Method of authorization in data communication systems |
| 02/09/1999 | US5870478 Modular exponentiation calculation apparatus and method |
| 02/09/1999 | US5870477 Enciphering/deciphering device and method, and encryption/decryption communication system |
| 02/09/1999 | US5870476 Process for pledging data for a secure data exchange protocol |
| 02/09/1999 | US5870473 Electronic transfer system and method |
| 02/09/1999 | US5870470 Method and apparatus for encrypting long blocks using a short-block encryption procedure |
| 02/09/1999 | US5870469 Method for testing the intactness of stored data in a processing facility for sheet material such as bank notes or papers of value |
| 02/09/1999 | US5870468 Enhanced data privacy for portable computers |
| 02/04/1999 | WO1999005819A1 Document or message security arrangements using a numerical hash function |
| 02/04/1999 | WO1999005817A1 Methods and apparatus for enhanced cmea including a cmea iteration preceded and followed by transformations and employing an involuntary lookup |
| 02/04/1999 | WO1999005628A1 Electronic bill presentment and payment system which deters cheating by employing hashes and digital signatures |
| 02/04/1999 | CA2266683A1 Methods and apparatus for enhanced cmea including a cmea iteration preceded and followed by transformations and employing an involuntary lookup |
| 02/03/1999 | EP0894973A1 Engine start controlling apparatus |
| 02/03/1999 | CN1206907A Information reproducing device,identifying device and information process system |
| 02/02/1999 | US5867578 Adaptive multi-step digital signature system and method of operation thereof |
| 02/02/1999 | US5867577 Method and apparatus for authenticating a data carrier intended to enable a transaction or access to a service or a location, and corresponding carrier |
| 02/02/1999 | CA2152628C System and method for key distribution using quantum cryptography |
| 01/28/1999 | WO1999004531A1 Method and apparatus for fast elliptical encryption with direct embedding |
| 01/28/1999 | CA2297059A1 Method and apparatus for fast elliptical encryption with direct embedding |
| 01/27/1999 | EP0893796A2 Information reproducing apparatus, authenticating apparatus, and information processing system |
| 01/27/1999 | EP0892953A1 Security apparatus and method for a data communications system |
| 01/27/1999 | CN1206296A Integrated circuit and method for secure data processing by means of this integrated circuit |
| 01/27/1999 | CN1206272A Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and method |
| 01/26/1999 | US5864829 Network charge method and system |
| 01/26/1999 | US5864491 Apparatus and associated method for generating a pseudo random number |
| 01/21/1999 | WO1999003079A1 Symmetrically-secured electronic communication system |
| 01/21/1999 | CA2258750A1 Methods and apparatus for enhanced security expansion of a secret key into a lookup table for improved security for wireless telephone messages |
| 01/20/1999 | EP0892521A2 Method and apparatus for long term verification of digital signatures |
| 01/20/1999 | EP0891661A1 Method and apparatus for data processing |
| 01/20/1999 | EP0719485A4 Access control for portable data storage media |
| 01/20/1999 | CN1205495A Cipher anti-counterfeit identifying method |
| 01/20/1999 | CN1205479A Apparatus, method and computer program product for protecting copyright data within computer system |
| 01/19/1999 | US5862223 Method and apparatus for a cryptographically-assisted commercial network system designed to facilitate and support expert-based commerce |
| 01/19/1999 | US5862218 Method and apparatus for in-camera image marking and authentication |
| 01/19/1999 | US5861619 Method of coding an electronic text document |
| 01/19/1999 | CA2100234C Commercial data masking |
| 01/14/1999 | WO1999001848A1 Procedure for the control of applications stored in a subscriber identity module |
| 01/14/1999 | WO1999001815A1 Obfuscation techniques for enhancing software security |
| 01/14/1999 | DE19750779C1 Traitor tracing or unauthorised user identification method for proprietary data |
| 01/13/1999 | EP0891054A2 Key recovery system and key recovery method |
| 01/13/1999 | EP0891053A2 Key recovery condition encryption and decryption apparatuses |
| 01/13/1999 | EP0890147A1 Co-processor for performing modular multiplication |
| 01/13/1999 | EP0719438B1 Access control system for restricting access to authorised hours and renewing it using a portable storage medium |
| 01/12/1999 | CA2095065C Secure toll collection system for moving vehicles |
| 01/07/1999 | WO1999000930A1 Method for the cryptographic conversion of l-bit input blocks of digital data into l-bit output blocks |
| 01/07/1999 | WO1999000783A1 Ciphering apparatus |
| 01/07/1999 | WO1999000775A1 Payment process and system |
| 01/07/1999 | EP0889617A2 Method and apparatus for recovering encryption session keys |
| 01/07/1999 | EP0717896B1 System and method for key distribution using quantum cryptography |
| 01/07/1999 | CA2295032A1 Payment process and system |
| 01/05/1999 | US5857024 IC card and authentication method for information processing apparatus |
| 01/05/1999 | US5857022 Enhanced cryptographic system and method with key escrow feature |
| 01/05/1999 | CA2111572C Digital signature algorithm |
| 01/05/1999 | CA2071413C Method to establish and enforce a network cryptographic security policy in a public key cryptosystem |
| 12/30/1998 | WO1998059327A1 Safety module |
| 12/30/1998 | EP0887982A2 Method and system for secure distribution of cryptographic keys on multicast networks |
| 12/30/1998 | EP0887981A2 Layer-independent security for communication channels |
| 12/30/1998 | EP0887979A2 Method and apparatus for client-host communication over a computer network |
| 12/30/1998 | EP0887728A2 Pseudorandom number sequence generator |
| 12/30/1998 | EP0887723A2 Apparatus, method and computer program product for protecting copyright data within a computer system |
| 12/30/1998 | CN1203486A Method and device for detecting additional information signal and controller for recording information signal |
| 12/30/1998 | CN1203394A Method and apparatus for protecting application data in secure storage areas |
| 12/30/1998 | CA2240880A1 Method and apparatus for recovering encryption session keys |
| 12/27/1998 | CA2241437A1 Method and apparatus for client-host communication over a computer network |
| 12/23/1998 | EP0886409A2 Information providing system |
| 12/23/1998 | EP0886399A2 Hash value generating method and device, data encryption method and device, data decryption method and device |
| 12/23/1998 | EP0886202A2 Method and apparatus for protecting application data in secure storage areas |
| 12/23/1998 | EP0885504A1 Data transmission network billing method and system |
| 12/23/1998 | EP0885501A1 Remote proxy system and method |
| 12/23/1998 | CA2241701A1 Method and system for secure distribution of cryptographic keys on multicast networks |
| 12/22/1998 | CA2126457C Method and system for writing data onto a medium so as to enable subsequent verification of authenticity |
| 12/22/1998 | CA2120665C Personal date/time notary device |
| 12/17/1998 | WO1998057461A1 Device for carrying out a block cipher method |
| 12/17/1998 | WO1998057454A1 Data scrambling system and method and communications system incorporating same |
| 12/16/1998 | EP0884669A2 Digital copyright management system using electronic watermark |
| 12/16/1998 | CN1202288A Document authentication system and method |
| 12/16/1998 | CN1202287A Wireless transation and information system |
| 12/15/1998 | US5850481 Steganographic system |
| 12/15/1998 | US5850452 Method for numerically scrambling data and its application to a programmable circuit |
| 12/15/1998 | US5850451 Enhanced cryptographic system and method with key escrow feature |
| 12/15/1998 | US5850449 Secure network protocol system and method |
| 12/15/1998 | US5850444 Method and apparatus for encrypting radio traffic in a telecommunications network |
| 12/15/1998 | US5850441 System and method for key distribution using quantum cryptography |
| 12/10/1998 | WO1998056180A1 Global conditional access system for broadcast services |
| 12/10/1998 | WO1998056179A1 Conditional access system for set-top boxes |
| 12/10/1998 | WO1998055930A1 Authentication system |
| 12/10/1998 | DE19724072A1 Vorrichtung zur Durchführung eines Blockchiffrierverfahrens Device for implementing a Blockchiffrierverfahrens |
| 12/09/1998 | EP0882340A1 Use of an encryption server for encrypting messages |
| 12/09/1998 | CN1201573A Secured gateway interface |
| 12/09/1998 | CN1201545A Method and apparatus for user authentication |