| 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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| 05/14/1997 | EP0772929A1 Methods and systems for creating and authenticating unalterable self-verifying articles |
| 05/14/1997 | CN1149797A Relicable control and access method and system for system resource in distribating system |
| 05/13/1997 | US5629980 System for controlling the distribution and use of digital works |
| 05/13/1997 | US5629770 Document copying deterrent method using line and word shift techniques |
| 05/09/1997 | WO1997016911A1 Secured gateway interface |
| 05/09/1997 | WO1997016903A1 Cryptographic methods for demonstrating satisfiable formulas from propositional logic |
| 05/09/1997 | WO1997016897A1 Computerized payment system for purchasing goods and services on the internet |
| 05/09/1997 | CA2236118A1 Computerized payment system for purchasing goods and services on the internet |
| 05/07/1997 | EP0771499A2 Method for securely using digital signatures in a commercial cryptographic system |
| 05/07/1997 | EP0771452A1 Authentication technique |
| 05/07/1997 | CN1149219A Licensee notification system |
| 05/06/1997 | US5627894 Random number generator |
| 05/06/1997 | US5627893 Cryptographic method |
| 05/02/1997 | EP0770953A2 Personal date/time notary device |
| 05/01/1997 | WO1997015348A1 Bio-active frequency generator and method |
| 04/30/1997 | DE19539415A1 Mechanical data-support with flat body |
| 04/30/1997 | CN1148765A Method of manufacturing generic meters in key management system |
| 04/29/1997 | US5625693 Apparatus and method for authenticating transmitting applications in an interactive TV system |
| 04/29/1997 | US5625692 Method and system for a public key cryptosystem having proactive, robust, and recoverable distributed threshold secret sharing |
| 04/29/1997 | US5625690 Software pay per use system |
| 04/27/1997 | CA2187970A1 Secure network protocol system and method |
| 04/23/1997 | EP0769770A2 Information transfer and use, particularly with respect to objects such as gambling chips |
| 04/22/1997 | US5623548 Transformation pattern generating device and encryption function device |
| 04/17/1997 | WO1997007657A3 Parameterized hash functions for access control |
| 04/16/1997 | EP0768775A2 Method and apparatus for mutual authentication according to the challenge/response principle |
| 04/16/1997 | EP0768601A1 Device for executing enciphered program |
| 04/16/1997 | EP0768595A1 System and method for providing masquerade protection in a computer network using session keys |
| 04/16/1997 | EP0767957A1 Method and apparatus for copy protection for various recording media |
| 04/16/1997 | CN1147741A Scrambled image communication device |
| 04/16/1997 | CN1147735A Communication method and communication device |
| 04/16/1997 | CN1147656A Cryptographic key management and validation system |
| 04/10/1997 | WO1997013342A1 Public key cryptography process based on the discrete logarithm |
| 04/10/1997 | WO1997013341A1 System for authenticating the location of remote users |
| 04/10/1997 | CA2233962A1 System for authenticating the location of remote users |
| 04/09/1997 | EP0766894A1 Process for generating electronic signatures, in particular for smart cards |
| 04/08/1997 | US5619573 Vehicle security device with electronic use authorization coding |
| 04/03/1997 | WO1997012461A1 Method for encryption of information |
| 04/03/1997 | WO1997012460A1 Document authentication system and method |
| 04/03/1997 | WO1997012344A2 Method, apparatus, system and firmware for secure transactions |
| 04/03/1997 | CA2232791A1 Method, apparatus, system and firmware for secure transactions |
| 04/02/1997 | EP0766424A2 Multiple size cryptographic key system |
| 04/02/1997 | EP0766165A2 Licensee notification system |
| 04/02/1997 | EP0676110B1 System and method for key distribution using quantum cryptography |
| 04/02/1997 | CN1146676A Cipher communication method |
| 03/27/1997 | WO1997011443A1 Method and apparatus for user authentication |
| 03/27/1997 | CA2230978A1 Method and apparatus for user authentication |
| 03/26/1997 | EP0765032A1 Remote control device for a video signal receiver |
| 03/26/1997 | CN1146122A Apparatus and method for authenticating transmitted applications in interative information system |
| 03/26/1997 | CN1146032A Cryptographic apparatus with double feedforward hash function |
| 03/19/1997 | EP0763913A1 Method for data escrowing for a secure data exchange protocol |
| 03/19/1997 | EP0680650B1 Method for secret notation of alphanumerical access codes and device for performing the same |
| 03/19/1997 | CN1145556A Automated system for identifying authorized system users |
| 03/19/1997 | CN1145490A System for tracking secure medical test cards |
| 03/18/1997 | US5613005 Cipher communication method and device |
| 03/18/1997 | US5612870 System for tracking secure medical test cards |
| 03/13/1997 | WO1997009802A1 Method and device for the sealing of computer data |
| 03/13/1997 | WO1996042041A3 Internet server access control and monitoring systems |
| 03/12/1997 | EP0762289A2 Method and system for securely controlling access to system resources in a distributed system |
| 03/12/1997 | EP0760987A1 Method of verifying the integrity of data stored on a processing facility used for processing sheet-like articles such as bank notes or bills |
| 03/12/1997 | CN1144942A Method of token verification in key management system |
| 03/06/1997 | WO1997007657A2 Parameterized hash functions for access control |
| 03/06/1997 | DE19532617A1 Verfahren und Vorrichtung zur Versiegelung von Computerdaten Method and apparatus for sealing of computer data |
| 03/04/1997 | US5608801 Efficient cryptographic hash functions and methods for amplifying the security of hash functions and pseudo-random functions |
| 03/04/1997 | CA2062170C Key distribution system for distributing a cipher key between two subsystems by one-way communication |
| 02/26/1997 | EP0759669A2 Method and apparatus for autokey rotor encryption |
| 02/25/1997 | US5606617 Secret-key certificates |
| 02/25/1997 | US5606616 Cryptographic apparatus with double feedforward hash function |
| 02/25/1997 | US5606613 Method for identifying a metering accounting vault to digital printer |
| 02/25/1997 | US5606610 Apparatus and method for storing data |
| 02/25/1997 | US5606361 Videophone interactive mailbox facility system and method of processing information |
| 02/25/1997 | CA2179352A1 Secure electronic entry system |
| 02/19/1997 | CN1143436A Apparatus and method for controlling access to and interconnection of computer system resources |
| 02/18/1997 | US5604803 Method and apparatus for secure remote authentication in a public network |
| 02/18/1997 | US5604802 Transaction processing system |
| 02/18/1997 | US5604801 Public key data communications system under control of a portable security device |
| 02/18/1997 | CA2183021A1 Method and apparatus for autokey rotor encryption |
| 02/12/1997 | CN1142716A method for processing digital signal in so-called secure communication system and use of this method for access control and/or binary signature |
| 02/11/1997 | US5602918 Application level security system and method |
| 02/11/1997 | US5602917 Method for secure session key generation |
| 02/05/1997 | EP0757459A2 Cryptographic system for wireless communications |
| 02/05/1997 | EP0377706B1 System for the secure handling of encryptor keys |
| 01/30/1997 | WO1997003398A1 Protection of software against use without permit |
| 01/29/1997 | EP0756399A2 Method for cryptographic communication |
| 01/29/1997 | EP0756398A1 System and method for communicating encrypted messages using RSA with modular reduction to provide fast decryption |
| 01/29/1997 | EP0755598A1 Computer network cryptographic key distribution system |
| 01/29/1997 | CN1141450A Software reproduction apparatus |
| 01/23/1997 | WO1997002679A1 Restritedly blindable certificates on secret keys |
| 01/23/1997 | WO1997002548A1 Value transfer system |
| 01/21/1997 | US5596639 Cd-prom |
| 01/20/1997 | CA2181597A1 Method and system for providing secure edi over an open net work |
| 01/15/1997 | EP0753816A1 A method and apparatus for storing sensitive information securely in a relatively insecure storage medium |
| 01/15/1997 | CN1140280A Software supply system, central unit, relay unit and terminal device for user |
| 01/15/1997 | CN1140279A Method and unit for authenticating keys |
| 01/08/1997 | EP0752786A1 Apparatus and method for authenticating transmitted applications in an interactive information system |
| 01/08/1997 | EP0752772A2 Cryptographic system for wireless communications |
| 01/08/1997 | EP0752771A1 Method for processing a digital signal such that the output digital signal can not be derived from the input signal, and use of the method for access control and/or digital signatures |
| 01/08/1997 | EP0752770A2 Cryptographic apparatus with double feedforward hash function |
| 01/08/1997 | EP0752663A1 Copyright control system |
| 01/08/1997 | EP0752636A2 NIS+ password update protocol |
| 01/08/1997 | EP0752635A1 System and method to transparently integrate private key operations from a smart card with host-based encryption services |