| 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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| 05/11/1995 | WO1995012733A1 Resynchronizing transmitters to receivers for secure vehicle entry using cryptography or rolling code |
| 05/10/1995 | EP0652681A2 Method of mobile radio unit registration and IC card registration for a mobile radio communication system |
| 05/09/1995 | WO1995014283A2 Protected distribution protocol for keying and certificate material |
| 05/09/1995 | US5414651 Arithmetic unit for multiplying long integers modulo M and R.S.A. converter provided with such multiplication device |
| 05/03/1995 | EP0651357A1 Transaction processing system |
| 05/03/1995 | CN1102265A 数据存储装置 Data storage means |
| 05/02/1995 | US5412723 Mechanism for keeping a key secret from mobile eavesdroppers |
| 05/02/1995 | CA2046320C Method and device for generating random numbers in a system comprising portable electronic objects |
| 04/25/1995 | US5410602 Method for key management of point-to-point communications |
| 04/25/1995 | CA2046289C Method for generating random numbers in a data processing system and system using said method |
| 04/20/1995 | WO1995010907A1 Cryptographic receiver |
| 04/13/1995 | WO1995010148A1 Multistream encryption system for secure communication |
| 04/13/1995 | CA2173732A1 Multistream encryption system for secure communication |
| 04/12/1995 | EP0647895A1 Method for preventing inadvertent betrayal of stored digital secrets by a trustee |
| 04/11/1995 | US5406628 Public key authentication and key agreement for low-cost terminals |
| 04/06/1995 | WO1995009498A1 Method for key management of point-to-point communications |
| 04/06/1995 | WO1995009410A1 Enciphering/deciphering device and method and enciphering/deciphering communication system |
| 04/05/1995 | EP0647079A1 Method and apparatus for protecting cordless telephone account authentication information |
| 04/05/1995 | EP0479997B1 Distributed information system having automatic invocation of key management negotiations protocol and method |
| 04/04/1995 | US5404402 Clock frequency modulation for secure microprocessors |
| 04/04/1995 | CA2023872C Databaseless security system |
| 03/30/1995 | WO1995008885A1 System and method for changing the key or password in a secure distributed communications network |
| 03/30/1995 | DE4411450C1 Vehicle security device with electronic use authorisation encoding |
| 03/29/1995 | CN1100878A Synchromization arrangement for a compressed video signal |
| 03/23/1995 | WO1995008232A1 Apparatus for key distribution in an encryption system |
| 03/23/1995 | WO1995008231A1 Access control for portable data storage media |
| 03/23/1995 | CA2171757A1 Access control for portable data storage media |
| 03/22/1995 | EP0644676A2 Secure message authentication for binary additive stream cipher systems |
| 03/22/1995 | EP0643858A1 Protecting programs and data with card reader |
| 03/22/1995 | CN1100544A Electronic black box method for anti-fake and software protection of credit card, certificate and trade mark |
| 03/16/1995 | WO1995007585A1 Method for key distribution using quantum cryptography |
| 03/16/1995 | WO1995007584A1 System and method for quantum cryptography |
| 03/16/1995 | WO1995007583A1 System and method for key distribution using quantum cryptography |
| 03/16/1995 | WO1995007582A1 Key distribution in a multiple access network using quantum cryptography |
| 03/16/1995 | DE4411449C1 Vehicle security device with electronic use-authorisation coding |
| 03/15/1995 | EP0643513A2 Method for verifying signatures in a communication system |
| 03/14/1995 | US5398284 Cryptographic encoding process |
| 03/09/1995 | WO1995006906A1 Method and apparatus for encryption having a feedback register with selectable taps |
| 02/21/1995 | US5392351 Electronic data protection system |
| 02/16/1995 | WO1995001685A3 Method for cryptographic authentication of transmitted messages using pseudorandom numbers |
| 02/15/1995 | EP0557359B1 Pocketable slide card for recording personal codes |
| 02/14/1995 | US5390247 Method and apparatus for creating, supporting, and using travelling programs |
| 02/09/1995 | WO1995004417A1 Restricted blind signatures |
| 02/09/1995 | WO1995004416A1 Method and system for authenticated secure key distribution in a communication system |
| 02/09/1995 | CA2168658A1 Restricted blind signatures |
| 02/07/1995 | US5388158 Secure document and method and apparatus for producing and authenticating same |
| 02/01/1995 | EP0636963A2 Authentication system using one-time passwords |
| 02/01/1995 | EP0636259A1 Cryptographic data security in a secured computer system. |
| 01/24/1995 | US5384847 Method and apparatus for protecting cordless telephone account authentication information |
| 01/19/1995 | WO1995002293A1 A method of detecting changes to a collection of digital signals |
| 01/18/1995 | EP0634038A1 A cryptographic communications method and system |
| 01/12/1995 | WO1995001686A1 Cryptographic authentication of transmitted messages using pseudo random numbers |
| 01/12/1995 | WO1995001685A2 Method for cryptographic authentication of transmitted messages using pseudorandom numbers |
| 01/12/1995 | CA2165551A1 Cryptographic authentication of transmitted messages using pseudo random numbers |
| 01/12/1995 | CA2159360A1 Method for cryptographic authentication of transmitted messages using pseudorandom numbers |
| 12/27/1994 | US5377270 Cryptographic authentication of transmitted messages using pseudorandom numbers |
| 12/21/1994 | EP0629953A1 Graphical manipulation of encryption |
| 12/20/1994 | US5375170 Method of generating and verifying digital signatures |
| 12/14/1994 | EP0628935A1 Portable object authentication method by an off-line terminal, corresponding portable object and terminal |
| 12/13/1994 | US5373561 Method of extending the validity of a cryptographic certificate |
| 12/08/1994 | WO1994028655A1 Nonlinear dynamic substitution devices and methods for block substitutions |
| 11/30/1994 | EP0626660A2 Document authentication system utilizing a transparent label |
| 11/30/1994 | CN2184236Y Cipher code controller |
| 11/29/1994 | US5369706 Resynchronizing transmitters to receivers for secure vehicle entry using cryptography or rolling code |
| 11/29/1994 | US5369705 Multi-party secure session/conference |
| 11/22/1994 | US5367148 Counterfeit detection using ID numbers with at least one random portion |
| 11/17/1994 | EP0624983A2 Synchronization arrangement for a compressed video signal |
| 11/17/1994 | EP0624839A1 Method and circuitry for producing a pseudo random sequence and its use |
| 11/15/1994 | US5365585 Method and apparatus for encryption having a feedback register with selectable taps |
| 11/10/1994 | WO1994026045A1 A repertoire of mappings for a cryptosystem |
| 11/10/1994 | WO1994026043A1 A system for wireless and encrypted transmission of information |
| 11/09/1994 | EP0624014A2 Personal date/time notary device |
| 11/08/1994 | US5363448 Pseudorandom number generation and cryptographic authentication |
| 10/19/1994 | EP0620688A2 Methods and systems for non-program applications for subscriber television |
| 10/12/1994 | EP0619660A1 Method of file signature and device for performing the method |
| 10/12/1994 | EP0619659A2 A shrinking generator for cryptosystems |
| 10/05/1994 | EP0618701A2 Hardware arrangement for enciphering bit blocks while renewing a key at each iteration |
| 09/28/1994 | EP0617383A2 Data storage device |
| 09/27/1994 | US5351300 Method of modifying pseudo-random sequences and device for scrambling or descrambling information components |
| 09/20/1994 | US5349642 Method and apparatus for authentication of client server communication |
| 09/15/1994 | WO1994021067A1 Two-way public key authentication and key agreement for low-cost terminals |
| 09/15/1994 | WO1994021055A1 Method for data compression |
| 09/15/1994 | CA2154575A1 Method for data compression |
| 09/13/1994 | US5347650 Device for transforming a digital data sequence into a condensed digital data block using tables and logic operators |
| 09/13/1994 | US5347581 Verification process for a communication system |
| 09/06/1994 | US5345507 In a communication system |
| 09/06/1994 | US5345506 Mutual authentication/cipher key distribution system |
| 09/01/1994 | WO1994019886A1 Digital dictation system with protection against unauthorised listening-in |
| 08/30/1994 | CA1331790C Reproduction of secure keys by using distributed key generation data |
| 08/30/1994 | CA1331789C Dynamic feedback arrangement scrambling technique keystream generator |
| 08/23/1994 | US5341426 Cryptographic key management apparatus and method |
| 08/23/1994 | US5341425 Methods and apparatus for uniquely encrypting data at a plurality of data transmission sites for transmission to a reception site |
| 08/23/1994 | CA1331642C Variants of the fiat-shamir identification and signature scheme |
| 08/23/1994 | CA1331641C System for conveying information for the reliable authentication of a plurality of documents |
| 08/23/1994 | CA1331640C Document authentication system |
| 08/18/1994 | WO1994018658A1 Coding-decoding card |
| 08/17/1994 | EP0598036A4 Nonlinear dynamic substitution devices and methods for block substitutions. |
| 08/09/1994 | US5337360 Method and apparatus for creating, supporting, and using travelling programs |
| 07/21/1994 | WO1994016509A1 A method and apparatus for generating a cipher stream |
| 07/20/1994 | EP0432186B1 Form and procedure for selecting a code to be kept secret |