| 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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| 04/30/1996 | US5513133 Compact microelectronic device for performing modular multiplication and exponentiation over large numbers |
| 04/25/1996 | WO1996012362A2 Secret-key certificates |
| 04/25/1996 | CA2200592A1 Secret-key certificates |
| 04/24/1996 | EP0707765A1 A method of detecting changes to a collection of digital signals |
| 04/24/1996 | CN1121221A Method and apparatus for authenticating a data carrier intended to enable a transaction or access to a service or a location and corresponding carrier |
| 04/24/1996 | CN1121219A Method for exchanging authentication and signing electronic signature |
| 04/23/1996 | US5511123 Symmetric cryptographic system for data encryption |
| 04/23/1996 | US5511121 Efficient electronic money |
| 04/17/1996 | EP0706735A1 Method for cryptographic authentication of transmitted messages using pseudorandom numbers |
| 04/17/1996 | EP0706734A1 Cryptographic authentication of transmitted messages using pseudo random numbers |
| 04/16/1996 | US5509074 Method of protecting electronically published materials using cryptographic protocols |
| 04/11/1996 | WO1996010810A1 Data transfer system with a terminal and a portable data carrier and process for reloading the portable data carrier by means of the terminal |
| 04/10/1996 | CN1120209A Scheme for authentication of at least one prover by a verifier |
| 04/09/1996 | US5506904 System and method for transmitting and receiving variable length authorization control for digital services |
| 04/04/1996 | DE4434649A1 Key with locking and coding system for puzzle |
| 04/03/1996 | EP0705005A2 Secret-key enciphering method and arrangement therefor capable of preventing unfair acquirement of information |
| 04/03/1996 | EP0704794A1 Modular operation calculation device and chipcard comprising such a device |
| 04/03/1996 | EP0704785A2 Data copyright management system |
| 04/03/1996 | EP0704124A1 A cryptographic method |
| 04/03/1996 | EP0704123A1 Methods and apparatus for uniquely end encrypting data |
| 04/02/1996 | US5504816 Method and apparatus for controlling access to digital signals |
| 03/28/1996 | DE4442755C1 Appts. for accumulation of personal identification numbers |
| 03/27/1996 | CN1119316A High-speed data disordering method |
| 03/26/1996 | US5502766 Data enclave and trusted path system |
| 03/26/1996 | US5502764 Method, identification device and verification device for identificaiton and/or performing digital signature |
| 03/21/1996 | WO1996008806A1 Method and device for facilitating access to a multitude of alphanumeric sequences |
| 03/20/1996 | EP0702286A2 Data management module, data reproduction management device and data reproduction management system |
| 03/14/1996 | WO1996008092A1 Roving software license for a hardware agent |
| 03/14/1996 | WO1996008012A1 Method and apparatus for fingerprinting and authenticating various magnetic media |
| 03/14/1996 | WO1996007975A1 Reader using moving averages to break the (n,k) code barrier for upc, ean, and others |
| 03/14/1996 | WO1995014283A3 Protected distribution protocol for keying and certificate material |
| 03/14/1996 | CA2199601A1 Method and apparatus for fingerprinting and authenticating various magnetic media |
| 03/13/1996 | EP0700614A1 Nonlinear dynamic substitution devices and methods for block substitutions |
| 03/13/1996 | EP0700613A1 A system for wireless and encrypted transmission of information |
| 03/13/1996 | EP0682832A4 Protected distribution protocol for keying and certificate material. |
| 03/13/1996 | EP0669064A4 Apparatus and method for providing data security in a computer system having a removable memory. |
| 03/13/1996 | CN1118544A Packet program component detector |
| 03/12/1996 | US5499299 Modular arithmetic operation system |
| 03/12/1996 | US5499297 System and method for trusted path communications |
| 03/07/1996 | WO1996002993A3 Method for securely using digital signatures in a commercial cryptographic system |
| 02/28/1996 | EP0698842A1 System for preventing use of unauthorized software with firmware device |
| 02/28/1996 | EP0698269A1 Error correctable data transmission method and device based on semi-cyclic codes |
| 02/22/1996 | WO1996005702A2 Method and apparatus for authentication in a communication system |
| 02/22/1996 | WO1996005674A1 Failsafe key escrow system |
| 02/22/1996 | WO1996005673A1 System and method for key escrow and data escrow encryption |
| 02/22/1996 | CA2197206A1 System and method for key escrow and data escrow encryption |
| 02/22/1996 | CA2171017A1 Method and apparatus for authentication in a communication system |
| 02/21/1996 | EP0697687A1 Method and system for transmitting information utilizing zero-knowledge certifying protocol |
| 02/21/1996 | CN1117227A Protected communication method and system |
| 02/20/1996 | US5493614 Private signature and proof systems |
| 02/20/1996 | CA2051365C Method for managing an application program loaded into a microcircuit medium |
| 02/15/1996 | DE19529487A1 Software supply system |
| 02/15/1996 | DE19529321A1 Authenticating coding keys |
| 02/15/1996 | DE19529320A1 Device for reproducing software and image and sound data and calculating charges |
| 02/14/1996 | CN1116890A Apparatus and method for storing data |
| 02/13/1996 | US5491749 Method and apparatus for entity authentication and key distribution secure against off-line adversarial attacks |
| 02/11/1996 | CA2144563A1 System for preventing use of unauthorized software with firmware device |
| 02/08/1996 | WO1996003821A1 Methods and systems for creating and authenticating unalterable self-verifying articles |
| 02/08/1996 | CA2195681A1 Methods and systems for creating and authenticating unalterable self-verifying articles |
| 02/07/1996 | EP0695997A2 Methods for providing secure access to shared information |
| 02/07/1996 | EP0695985A1 Logon certificates |
| 02/07/1996 | CN1116341A Copy-proof chaos software security card |
| 02/01/1996 | WO1996002993A2 Method for securely using digital signatures in a commercial cryptographic system |
| 02/01/1996 | WO1996002901A1 Authentication technique |
| 02/01/1996 | WO1996002899A1 Access control system for restricting access to authorised hours and renewing it using a portable storage medium |
| 02/01/1996 | CA2195003A1 Authentication technique |
| 02/01/1996 | CA2194475A1 Method for securely using digital signatures in a commercial cryptographic system |
| 01/31/1996 | EP0694846A1 Numerial scrambling method and its application to a programmable circuit |
| 01/31/1996 | EP0694232A1 Method for data compression |
| 01/30/1996 | US5488661 Data communication system and method with data scrambling |
| 01/23/1996 | US5486864 Differential time code method and apparatus as for a compressed video signal |
| 01/18/1996 | WO1996001536A1 A method of messaging in a communication system |
| 01/17/1996 | CN1115163A Pre-location of authentication information in a personal communication system |
| 01/17/1996 | CN1115150A Controlled-access broadcast signal receiving system |
| 01/17/1996 | CN1115059A Method and apparatus for enabling trial period use of software products: method and apparatus for allowing a try-and-buy user interaction |
| 01/16/1996 | US5485577 Method and apparatus for incremental delivery of access rights |
| 01/16/1996 | CA2059172C Authentication protocols in communication networks |
| 01/11/1996 | WO1996000963A1 Method and apparatus for copy protection for various recording media |
| 01/10/1996 | EP0691787A1 Receiving controlled-access broadcast signals |
| 01/10/1996 | EP0691055A1 Two-way public key authentication and key agreement for low-cost terminals |
| 01/09/1996 | US5483597 Authentication process for at least one identification device using a verification device and a device embodying the process |
| 01/09/1996 | US5483596 Apparatus and method for controlling access to and interconnection of computer system resources |
| 01/03/1996 | EP0690646A2 Pre-location of authentication information in a personal communication system |
| 01/02/1996 | US5481613 Computer network cryptographic key distribution system |
| 12/27/1995 | EP0689316A2 Method and apparatus for user identification and verification of data packets in a wireless communications network |
| 12/27/1995 | EP0688480A1 A method and system for audio information dissemination using various transmission modes |
| 12/26/1995 | US5479509 Method for signature of an information processing file, and apparatus for implementing it |
| 12/26/1995 | US5479365 Exponentiation remainder operation circuit |
| 12/23/1995 | CA2149067A1 User-identification and verification of data integrity in a wireless communication system |
| 12/21/1995 | DE4420689A1 Process for coding personal identification and other secret numbers |
| 12/20/1995 | CN1113584A Method for recognizing carried certificate by remote terminal, correspondent carried certificate and terminal |
| 12/14/1995 | DE4420466A1 Template for encoding and decoding written material |
| 12/13/1995 | EP0687087A2 Secure data transmission method |
| 12/13/1995 | EP0686905A1 Method and apparatus for secure remote authentication in a public network |
| 12/13/1995 | EP0686328A1 Digital dictation system with protection against unauthorised listening-in |
| 12/12/1995 | US5475826 Method for protecting a volatile file using a single hash |
| 12/12/1995 | US5475758 User authenticating system and method in wide area distributed environment |
| 12/12/1995 | US5475757 Secure data transmission method |
| 12/12/1995 | US5475756 Method of authenticating a terminal in a transaction execution system |
| 12/05/1995 | US5473693 Apparatus for avoiding complementarity in an encryption algorithm |