| 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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| 09/04/1996 | CN1130453A Method for improved security of CRC encryption system |
| 09/03/1996 | US5552781 Fault tolerant method of decoding an electronic key system |
| 08/22/1996 | WO1996025814A1 Multi-purpose transaction card system |
| 08/22/1996 | WO1996025813A1 Encoding device |
| 08/21/1996 | EP0727727A2 Portable interactive storage device and method of displaying its contents |
| 08/21/1996 | EP0727118A1 Method for improved security of crc encryption system |
| 08/21/1996 | EP0727117A1 Method for automatic resynchronization of the transmitter/receiver pair in a remote keyless entry system |
| 08/20/1996 | US5548648 Encryption method and system |
| 08/20/1996 | US5548110 Optical error-detecting, error-correcting and other coding and processing, particularly for bar codes, and applications therefor such as counterfeit detection |
| 08/13/1996 | US5546462 Method and apparatus for fingerprinting and authenticating various magnetic media |
| 08/08/1996 | WO1996024209A1 Cd-prom |
| 08/08/1996 | WO1996024092A2 A method and system for managing a data object so as to comply with predetermined conditions for usage |
| 08/07/1996 | EP0725512A2 Data communication system using public keys |
| 08/07/1996 | EP0725511A2 Method for data encryption/decryption using cipher block chaining (CBC) and message authetication codes (MAC) |
| 08/07/1996 | CN1128571A Method for the production of a key common to two devices for implementing a common cryptographic procedure and associated apparatus |
| 08/06/1996 | US5544245 Mutual authentication/cipher key delivery system |
| 08/06/1996 | US5543920 System and method for sensing color and preventing use of unauthorized color formulation software |
| 08/06/1996 | CA2118826C Hardware arrangement for enciphering bit blocks while renewing a key at each iteration |
| 07/24/1996 | EP0723373A2 Decryptor |
| 07/24/1996 | EP0723349A2 Method and apparatus for secure anonymous message transfer and electronic voting |
| 07/24/1996 | EP0723348A2 Method and system for a public key cryptosystem having proactive, robust, and recoverable distributed threshold secret sharing |
| 07/24/1996 | EP0722642A1 Multistream encryption system for secure communication |
| 07/24/1996 | EP0722640A1 Cryptographic receiver |
| 07/23/1996 | US5539827 Device and method for data encryption |
| 07/23/1996 | US5539826 Method for message authentication from non-malleable crypto systems |
| 07/23/1996 | US5539825 Electronic cashless transaction system |
| 07/23/1996 | US5539824 Method and system for key distribution and authentication in a data communication network |
| 07/23/1996 | US5539450 Methods and systems for providing additional service applications in pay television |
| 07/23/1996 | US5538773 Optical recording medium and the reproducing apparatus for the optical recording medium |
| 07/18/1996 | WO1996021917A1 Method and relative support for the transcription and deciphering of alphanumeric codes |
| 07/17/1996 | EP0722151A2 Security module for a printing apparatus |
| 07/17/1996 | EP0721718A1 Method and apparatus for authentication in a communication system |
| 07/16/1996 | US5537642 Method for authenticating messages passed between tasks |
| 07/16/1996 | US5537474 Method and apparatus for authentication in a communication system |
| 07/11/1996 | DE19514084C1 Processor-controlled exchange of cryptographic keys, e.g. in mobile communications |
| 07/10/1996 | EP0720796A1 System and method for changing the key or password in a secure distributed communications network |
| 07/04/1996 | WO1996020461A1 Method for implementing a private key communication protocol between two processing devices |
| 07/04/1996 | CA2208983A1 Method for implementing a private key communication protocol between two processing devices |
| 07/03/1996 | EP0720326A2 Method for secure session key generation |
| 07/03/1996 | EP0720127A2 System for tracking secure medical test cards |
| 07/03/1996 | EP0719485A1 Access control for portable data storage media |
| 07/03/1996 | EP0719438A1 Access control system for restricting access to authorised hours and renewing it using a portable storage medium |
| 07/03/1996 | EP0719370A1 Resynchronizing transmitters to receivers for secure vehicle entry using cryptography or rolling code |
| 07/03/1996 | CN1126005A Error correctable data transmission method and device based on semi-cyclic codes |
| 07/02/1996 | US5533051 Method for data compression |
| 07/01/1996 | CA2166150A1 System for tracking secure medical test cards |
| 07/01/1996 | CA2166146A1 Automated system for identifying authorized system users |
| 06/26/1996 | EP0719007A2 Small size product cipher apparatus |
| 06/26/1996 | EP0718803A2 Identifying a specific combination of metering accounting vault and digital printer |
| 06/26/1996 | EP0718802A2 Preventing monitoring of data remotely sent from a metering accounting vault to digital printer |
| 06/26/1996 | EP0717898A1 A method of messaging in a communication system |
| 06/26/1996 | EP0717897A1 System and method for quantum cryptography |
| 06/26/1996 | EP0717896A1 System and method for key distribution using quantum cryptography |
| 06/26/1996 | EP0717895A1 Key distribution in a multiple access network using quantum cryptography |
| 06/25/1996 | US5530757 Distributed fingerprints for information integrity verification |
| 06/25/1996 | US5530235 Interactive contents revealing storage device |
| 06/23/1996 | CA2165905A1 Small size product cipher apparatus |
| 06/20/1996 | WO1996005702A3 Method and apparatus for authentication in a communication system |
| 06/20/1996 | DE19547283A1 Encoding system for use in providing e.g. identification code in different access systems without keys e.g. in motor vehicle |
| 06/19/1996 | EP0717566A1 Method and apparatus for incremental delivery of access rights |
| 06/19/1996 | EP0717564A2 Copy prevention method and apparatus for digital video system |
| 06/19/1996 | EP0717376A2 Postage meter device and system and method for communications with postage meters |
| 06/19/1996 | EP0717338A1 Method of protecting copyright |
| 06/18/1996 | US5528231 Method for the authentication of a portable object by an offline terminal, and apparatus for implementing the process |
| 06/18/1996 | CA2043533C Electronic notary |
| 06/17/1996 | CA2160942A1 Method of protecting proprietary rights in works of authorship |
| 06/15/1996 | CA2162774A1 System and method for communications with postage meters |
| 06/12/1996 | CN1032039C Encryption system for digital cellular communications |
| 06/06/1996 | WO1996017475A1 Secure authorization and control method and apparatus for a game delivery service |
| 06/06/1996 | WO1996017334A1 Device for storing personal identification numbers |
| 06/06/1996 | CA2206234A1 Secure authorization and control method and apparatus for a game delivery service |
| 06/05/1996 | EP0715247A1 System for controlling the distribution and use of digital works using digital tickets |
| 06/05/1996 | EP0715246A1 System for controlling the distribution and use of composite digital works |
| 06/05/1996 | EP0715245A1 System for controlling the distribution and use of digital works |
| 06/05/1996 | EP0715244A1 System for controlling the distribution and use of digital works utilizing a usage rights grammar |
| 06/05/1996 | EP0715243A1 System for controlling the distribution and use of digital works having a fee reporting mechanism |
| 06/05/1996 | DE19505097C1 Verschlüsselungsvorrichtung Encryption device |
| 05/30/1996 | WO1996012362A3 Secret-key certificates |
| 05/28/1996 | US5521980 Privacy-protected transfer of electronic information |
| 05/23/1996 | WO1996015621A1 Method for certifying a copy of a document such as a fax |
| 05/23/1996 | WO1996015604A1 Message protection system and method |
| 05/23/1996 | CA2204878A1 Message protection system and method |
| 05/22/1996 | CN1123076A A method and system for audio information dissemination using various transmission modes |
| 05/21/1996 | US5519706 Dynamic user registration method in a mobile communications network |
| 05/15/1996 | EP0712072A1 Method for the implementation of Montgomery modular reduction |
| 05/15/1996 | EP0712071A1 Process for implementing modular multiplication according to the Montgomery method |
| 05/15/1996 | EP0712070A1 Production process of an error correcting parameter associated with the implementation of modular operations according to the Montgomery method |
| 05/15/1996 | EP0711480A1 Method and system for authenticated secure key distribution in a communication system |
| 05/09/1996 | WO1996013921A1 Digital document authentication system for providing a certificate which authenticates and uniquely identifies a document |
| 05/09/1996 | WO1996013920A1 Method and apparatus for secure identification of a mobile user in a communication network |
| 05/08/1996 | EP0710934A2 Methods and systems for performing article authentication |
| 05/07/1996 | US5515440 Preboot protection of unauthorized use of programs and data with a card reader interface |
| 05/07/1996 | US5515439 Exchange certificate for one way validation of information |
| 05/07/1996 | US5514860 Document authentication system utilizing a transparent label |
| 05/04/1996 | CA2158295A1 Methods and systems for performing article authentication |
| 05/01/1996 | EP0709972A1 Method of decoding an electronic key system |
| 05/01/1996 | EP0709760A2 Data copyright management system |
| 05/01/1996 | EP0708949A1 Method for the production of a key common to two devices for implementing a common cryptographic procedure and associated apparatus |
| 05/01/1996 | CN1121754A A repertoire of mappings for a cryptosystem |
| 04/30/1996 | US5513260 Method and apparatus for copy protection for various recording media |