| 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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| 01/21/1998 | EP0819345A1 Electronic funds transfer instruments |
| 01/21/1998 | EP0717897B1 System and method for quantum cryptography |
| 01/14/1998 | EP0818762A2 Coding device, decoding device and IC circuit |
| 01/14/1998 | EP0818094A1 Asymmetrical cryptographic communication method and portable object therefor |
| 01/14/1998 | EP0818007A1 Method and means for interconnecting different security level networks |
| 01/13/1998 | US5708715 Integrated circuit device with function usage control |
| 01/13/1998 | US5708712 Vehicle security device with electronic use authorization coding |
| 01/13/1998 | US5708709 Program usage management system |
| 01/08/1998 | WO1998000972A1 Method and apparatus for operating a transactional server in a proprietary database environment |
| 01/07/1998 | EP0817420A2 Authentication method, communication method, and information processing apparatus |
| 01/07/1998 | EP0817185A2 Enciphering method, deciphering method, recording and reproducing method, deciphering device, deciphering unit device, recording medium, recording-medium manufacturing method, and key control method |
| 01/07/1998 | EP0817103A2 System and method for on-line multimedia access |
| 01/07/1998 | EP0816967A2 Secure file system |
| 01/07/1998 | EP0815670A1 Multi-purpose transaction card system |
| 01/07/1998 | EP0815526A1 Deferred billing, broadcast, electronic document distribution system and method |
| 01/07/1998 | EP0667998A4 Method and apparatus for authentication of client server communication. |
| 01/07/1998 | EP0265497B1 Information transfer and use, particularly with respect to objects such as gambling chips |
| 12/31/1997 | WO1997050248A1 Encryption and decryption of multi-media data |
| 12/31/1997 | CN1169071A Accounting device, communication apparatus, and communication system |
| 12/30/1997 | US5703952 Method and apparatus for generating a cipher stream |
| 12/30/1997 | US5703951 System and method for access data control |
| 12/30/1997 | US5703948 Protected communication method and system |
| 12/30/1997 | US5703907 Method for data compression |
| 12/24/1997 | WO1997049213A1 Apparatus and method for secure commmunication based on channel characteristics |
| 12/24/1997 | WO1997049211A1 Method and apparatus for data processing |
| 12/24/1997 | CA2257645A1 Apparatus and method for secure commmunication based on channel characteristics |
| 12/17/1997 | EP0813150A2 Method and system for escrowed backup of hotelled world wide web sites |
| 12/17/1997 | CN1168041A Encryption/decryption method and encryption/decryption apparatus |
| 12/16/1997 | US5699434 Method of inhibiting copying of digital data |
| 12/16/1997 | US5699429 Packet TV program component detector |
| 12/11/1997 | WO1997047110A1 Public key cryptography method |
| 12/11/1997 | WO1997047109A1 Process for cryptographic code management between a first computer unit and a second computer unit |
| 12/11/1997 | WO1997046983A2 Method and device for loading input data into an algorithm during authentication |
| 12/11/1997 | WO1997041661A3 Use of an encryption server for encrypting messages |
| 12/11/1997 | DE19622533A1 Verfahren und Vorrichtung zum Laden von Inputdaten in einen Algorithmus bei der Authentikation Method and apparatus for loading input data into an algorithm during the authentication |
| 12/11/1997 | CA2257907A1 Public key cryptography method |
| 12/10/1997 | EP0812081A2 Charging system and charging method for electronic commerce |
| 12/10/1997 | EP0789912A4 Method and apparatus for fingerprinting and authenticating various magnetic media |
| 12/10/1997 | CN1167304A Decipher method and electronic device thereof |
| 12/09/1997 | US5696826 Method and apparatus for encrypting and decrypting information using a digital chaos signal |
| 12/09/1997 | US5696823 High-bandwidth encryption system with low-bandwidth cryptographic modules |
| 12/04/1997 | DE19625635C1 Verschlüsselung und Entschlüsselung von Multimediadaten Encryption and decryption of the multimedia data |
| 12/03/1997 | EP0810563A2 Method and apparatus for implementing hierarchical electronic cash |
| 12/03/1997 | EP0810560A2 Digital encoding of personal signatures |
| 12/03/1997 | EP0809905A1 Encoding device |
| 12/03/1997 | EP0809903A1 Electronic transfer system and method |
| 12/02/1997 | US5694569 Method for protecting a volatile file using a single hash |
| 11/27/1997 | WO1997044935A1 Cryptographic method and apparatus for non-linearly merging a data block and a key |
| 11/26/1997 | EP0809401A1 Method for reading a service card |
| 11/25/1997 | US5690692 Bio-active frequency generator and method |
| 11/20/1997 | WO1997043761A2 Cryptographic methods, apparatus and systems for storage media electronic rights management in closed and connected appliances |
| 11/19/1997 | EP0807911A2 Client/server protocol for proving authenticity |
| 11/19/1997 | EP0807347A2 A system for securing the flow of and selectively modifying packets in a computer network |
| 11/19/1997 | EP0807346A1 Cd-prom |
| 11/19/1997 | EP0807283A2 A method and system for managing a data object so as to comply with predetermined conditions for usage |
| 11/19/1997 | EP0489742B1 Encryption method |
| 11/18/1997 | US5689567 Electronic signature method and apparatus |
| 11/18/1997 | US5689560 Method and apparatus for enabling trial period use of software products: method and apparatus for allowing a try-and-buy user interaction |
| 11/18/1997 | US5689247 Automated system for identifying authorized system users |
| 11/13/1997 | WO1997042610A1 Method for performing a double-signature secure electronic transaction |
| 11/11/1997 | US5687238 Small size product cipher apparatus |
| 11/06/1997 | WO1997041661A2 Use of an encryption server for encrypting messages |
| 11/06/1997 | WO1997041539A1 A system and method for secure network electronic payment and credit collection |
| 11/05/1997 | EP0804781A1 Method and relative support for the transcription and deciphering of alphanumeric codes |
| 11/05/1997 | CN1164306A Methods and systems for creating and authenticating unalterable self-verifying articles |
| 11/05/1997 | CN1164290A Data transfer system with terminal and portable data carrier and process for reloading the portable data carrier by means of the terminal |
| 11/04/1997 | US5684876 Communication system |
| 10/29/1997 | EP0803153A1 Private signature and proof systems |
| 10/28/1997 | US5682430 Secure anonymous message transfer and voting scheme |
| 10/23/1997 | WO1997039238A1 Engine start controlling apparatus |
| 10/22/1997 | EP0802654A2 Enciphering method, deciphering method and certifying method |
| 10/22/1997 | EP0802653A2 Multi-cycle non-parallel data encryption engine |
| 10/22/1997 | EP0802652A2 Data encryptor having a scalable clock |
| 10/22/1997 | EP0802474A2 Accounting device, communicating apparatus, and communication system |
| 10/21/1997 | US5680461 Computer network |
| 10/21/1997 | US5680456 Method of manufacturing generic meters in a key management system |
| 10/21/1997 | US5680453 Software delivery system, center device, relaying device and user terminal device |
| 10/21/1997 | US5678862 Indicating device |
| 10/16/1997 | WO1997038531A1 In-camera image marking and authentication |
| 10/15/1997 | EP0801479A1 Data network security system and method |
| 10/15/1997 | EP0801345A1 Circuit and method for modulo multiplication and exponentiation arithmetic |
| 10/15/1997 | EP0800691A1 Method for implementing a private key communication protocol between two processing devices |
| 10/14/1997 | US5677955 Electronic funds transfer instruments |
| 10/14/1997 | US5677953 System and method for access control for portable data storage media |
| 10/14/1997 | US5677952 Method to protect information on a computer storage device |
| 10/08/1997 | EP0800327A2 A customer telecommunication interface device having a unique identifier |
| 10/08/1997 | CN1161517A Ciphering and deciphering system |
| 10/07/1997 | US5675652 Computer readable device implementing a software-efficient pseudorandom function encryption |
| 10/07/1997 | US5675648 System and method for key distribution using quantum cryptography |
| 10/07/1997 | US5675137 Bar code decoding using moving averages to break the (n,k) code barrier for UPC, EAN Code 128 and others |
| 10/01/1997 | EP0798892A2 Creation and distribution of digital documents |
| 10/01/1997 | EP0798891A2 Identification number issuing device and identification number verification device |
| 10/01/1997 | EP0798657A2 Virtual shop computer network system which displays member shops and member shop certification method |
| 10/01/1997 | CN1160956A Identification number issuing device and identification number verification device |
| 09/30/1997 | US5673322 System and method for providing protocol translation and filtering to access the world wide web from wireless or low-bandwidth networks |
| 09/30/1997 | US5673319 Block cipher mode of operation for secure, length-preserving encryption |
| 09/30/1997 | US5673318 Method and apparatus for data authentication in a data communication environment |
| 09/30/1997 | US5673316 Creation and distribution of cryptographic envelope |
| 09/25/1997 | WO1997035402A1 Remote proxy system and method |
| 09/25/1997 | WO1997035282A1 Data-transmission device, consisting of a pulse generator and a monitoring unit, for use in vehicle, and pulse generator for use with the monitoring unit |