| 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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| 09/25/1997 | CA2355318A1 Remote proxy system and method |
| 09/24/1997 | CN1160317A Communication device and method |
| 09/23/1997 | US5671284 Data encryptor having a scalable clock |
| 09/18/1997 | WO1997034232A1 Security apparatus and method for a data communications system |
| 09/18/1997 | DE19610161A1 Datenübertragungsvorrichtung in einem Fahrzeug, bestehend aus einem Impulsgeber und einem Kontrollgerät, sowie Impulsgeber für das Kontrollgerät Data transmission device in a vehicle consisting of a pulse generator and a control device, as well as inspiration for the recording equipment |
| 09/17/1997 | EP0795979A2 Method and system for indicating the moment of performing a cryptographic process |
| 09/17/1997 | EP0795253A1 Secure authorization and control method and apparatus for a game delivery service |
| 09/17/1997 | EP0795241A1 Public key cryptography process based on the discrete logarithm |
| 09/17/1997 | EP0795240A1 Message protection system and method |
| 09/16/1997 | US5668875 Method and apparatus for authentication in a communication system |
| 09/16/1997 | US5668872 Information processing method and system |
| 09/16/1997 | CA2200037A1 A procedure and a system for indicating the time of completion of a cryptographic procedure |
| 09/12/1997 | WO1997033404A1 Data transmission network billing method and system |
| 09/10/1997 | EP0794479A1 Method and apparatus for providing dynamic network file system client authentication |
| 09/10/1997 | EP0598036B1 Nonlinear dynamic block substitution methods. |
| 09/03/1997 | EP0793387A2 Tv mail system |
| 09/03/1997 | EP0793367A2 Key distribution system and method |
| 09/03/1997 | EP0793366A2 Method and apparatus for encrypting data |
| 09/03/1997 | EP0792553A1 Method for certifying a copy of a document such as a fax |
| 09/03/1997 | EP0719370B1 Resynchronizing transmitters to receivers for secure vehicle entry using cryptography or rolling code |
| 09/03/1997 | CN1158461A Data acquiring apparatus |
| 08/27/1997 | EP0792045A2 Method and apparatus for authentication using digital signatures |
| 08/27/1997 | EP0792044A2 Device and method for authenticating user's access rights to resources according to the Challenge-Response principle |
| 08/27/1997 | EP0792041A2 Method and apparatus for block encryption |
| 08/27/1997 | EP0791923A2 Method of inhibiting copying of digital data |
| 08/27/1997 | CN1158195A System and method for key escrow and data escrow encryption |
| 08/26/1997 | US5661807 Authentication system using one-time passwords |
| 08/26/1997 | US5661806 Process of combined authentication of a telecommunication terminal and of a user module |
| 08/26/1997 | US5661805 Signature verification apparatus capable of obtaining information required for a document recipient by using an apparatus's verification key alone |
| 08/26/1997 | US5661803 Method of token verification in a key management system |
| 08/20/1997 | EP0789912A1 Method and apparatus for fingerprinting and authenticating various magnetic media |
| 08/19/1997 | US5659618 Multi-size cryptographic key system |
| 08/19/1997 | US5659616 Method for securely using digital signatures in a commercial cryptographic system |
| 08/13/1997 | EP0788946A2 Method and apparatus for programming operational data into automotive parts |
| 08/13/1997 | EP0788688A1 Method and apparatus for secure identification of a mobile user in a communication network |
| 08/07/1997 | WO1997019427A3 Foreign exchange transaction system |
| 08/06/1997 | EP0418328B1 Card-computer moderated systems |
| 08/06/1997 | CN1156293A Communication apparatus |
| 08/05/1997 | US5654746 Secure authorization and control method and apparatus for a game delivery service |
| 07/31/1997 | WO1997027688A1 Asymmetrical cryptographic communication method and portable object therefor |
| 07/30/1997 | EP0786178A1 Secret-key certificates |
| 07/30/1997 | CN1155799A Generation of cryptographic signatures using hash keys |
| 07/29/1997 | US5652908 Method and apparatus for establishing communications sessions in a remote resource control environment |
| 07/24/1997 | WO1997026611A1 Deferred billing, broadcast, electronic document distribution system and method |
| 07/23/1997 | EP0785656A2 Data acquiring apparatus |
| 07/17/1997 | WO1997025801A1 Secure anonymous information exchange in a network |
| 07/17/1997 | WO1997025668A1 Modular arithmetic coprocessor comprising an integer division circuit |
| 07/16/1997 | EP0784392A2 Key distribution for communication network |
| 07/16/1997 | EP0783741A1 Data transfer system comprising a terminal and a portable data carrier and method of recharging the portable data carrier by means of the terminal |
| 07/16/1997 | EP0720796B1 System and method for changing the key or password in a secure distributed communications network |
| 07/16/1997 | CN1154749A Method for monitoring a digital multiprocessor |
| 07/16/1997 | CN1154516A Secure network protocol system and method |
| 07/10/1997 | WO1997024832A1 Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers |
| 07/08/1997 | US5647000 Failsafe key escrow system |
| 07/08/1997 | US5646999 Data coypright management method |
| 07/08/1997 | US5646996 Automatic resynchronization of transmitter in the event of corrupted memory |
| 07/03/1997 | WO1997023972A1 Application level security system and method |
| 07/02/1997 | EP0782322A2 Method of and apparatus for embedding data into an electronic document |
| 07/02/1997 | EP0782296A2 Securing transmission and receipt of electronic data |
| 07/02/1997 | EP0781442A1 Method and device for facilitating access to a multitude of alphanumeric sequences |
| 06/26/1997 | WO1997023074A1 Tame automorphism public key system |
| 06/26/1997 | WO1997019519A3 Telecommunications system |
| 06/25/1997 | EP0781065A2 Method for securing the usage of a terminal of a cellular radio communication system, terminal and user-card therefor |
| 06/25/1997 | EP0781003A2 Generation of cryptographic signatures using hash keys |
| 06/25/1997 | EP0780804A2 Token generation process in an open metering system |
| 06/25/1997 | EP0780039A1 Roving software license for a hardware agent |
| 06/25/1997 | CN1152968A Authentication technique |
| 06/24/1997 | US5642420 Cryptoinformation repeater, subscriber terminal connected thereto, and cryptocommunication method |
| 06/23/1997 | CA2184946A1 Generation of cryptographic signatures using hash keys |
| 06/22/1997 | CA2193712A1 Process to allow secure use of a cellular radio system terminal and the corresponding user terminal and card |
| 06/19/1997 | WO1997022192A1 Constructing symmetric ciphers using the cast design procedure |
| 06/19/1997 | WO1997022191A1 Electronic transfer system and method |
| 06/19/1997 | WO1996027155A3 Systems and methods for secure transaction management and electronic rights protection |
| 06/19/1997 | DE19652294A1 Elektronisches Übertragungssystem und Verfahren Electronic transmission system and method |
| 06/18/1997 | EP0779738A2 Communication apparatus and communication method |
| 06/18/1997 | CN1152363A Device for executing enciphered program |
| 06/17/1997 | US5640455 Secret-key enciphering method and arrangement therefor capable of preventing unfair acquirement of information |
| 06/11/1997 | EP0778512A2 System and method for managing try-and-buy usage of application programs |
| 06/11/1997 | EP0711480B1 Method and system for authenticated secure key distribution in a communication system |
| 06/10/1997 | US5638443 System for controlling the distribution and use of composite digital works |
| 06/05/1997 | WO1997020266A1 An improved pseudo-random generator |
| 06/04/1997 | EP0636259B1 Cryptographic data security in a secured computer system |
| 06/03/1997 | US5636277 System for licensing to use software products |
| 05/29/1997 | WO1997019537A1 Remote-auditing of computer generated outcomes using cryptographic and other protocols |
| 05/29/1997 | WO1997019519A2 Telecommunications system |
| 05/29/1997 | WO1997019427A2 Foreign exchange transaction system |
| 05/28/1997 | EP0776112A2 Secure network protocol system and method |
| 05/28/1997 | EP0776107A2 Multimedia coordination system |
| 05/28/1997 | EP0775401A1 System and method for key escrow and data escrow encryption |
| 05/28/1997 | EP0672273A4 Method and apparatus for encryption having a feedback register with selectable taps. |
| 05/28/1997 | CN1150849A Method of verifying integrity of data stored on processing facility used for processing sheet-like articles such as bank notes or bills |
| 05/28/1997 | CN1150737A Copy prevention method and apparatus for digital video system |
| 05/28/1997 | CN1150726A Process for pledging data for secure data exchange protocol |
| 05/27/1997 | US5634012 System for controlling the distribution and use of digital works having a fee reporting mechanism |
| 05/27/1997 | US5633928 Key escrow method with warrant bounds |
| 05/22/1997 | WO1997018654A1 Apparatus and method for encrypting mpeg packets |
| 05/22/1997 | WO1997018653A1 Wireless transaction and information system |
| 05/22/1997 | WO1997018652A1 Efficient cryptographic hash functions and methods for amplifying the security of hash functions and pseudo-random functions |
| 05/15/1997 | WO1997012344A3 Method, apparatus, system and firmware for secure transactions |
| 05/14/1997 | EP0773647A2 Method and apparatus for cryptographic communications using blind signatures |