| 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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| 01/05/2000 | EP0968611A1 Data processing system |
| 01/05/2000 | EP0968610A1 Transmission and reception of television programmes and other data |
| 01/05/2000 | EP0968609A1 Signal generation and broadcasting |
| 01/05/2000 | EP0968608A1 Broadcast and reception system, and receiver/decoder and remote controller therefor |
| 01/05/2000 | EP0968607A1 Smartcard for use with a receiver of encrypted broadcast signals, and receiver |
| 01/05/2000 | EP0968602A1 Extracting data sections from a transmitted data stream |
| 01/05/2000 | EP0968469A1 Computer memory organization |
| 01/05/2000 | EP0968468A1 Computer memory organization |
| 01/05/2000 | EP0968465A1 Television or radio control system development |
| 01/04/2000 | US6011848 Method and system for message delivery utilizing zero knowledge interactive proof protocol |
| 12/29/1999 | WO1999067920A1 A technique for producing privately authenticatable cryptographic signatures and for using such a signature in conjunction with a product copy |
| 12/29/1999 | WO1999067919A2 Improved des and other cryptographic processes with leak minimization for smartcards and other cryptosystems |
| 12/29/1999 | EP0966839A1 In-camera image marking and authentication |
| 12/29/1999 | EP0966809A1 Method of and apparatus for encrypting signals for transmission |
| 12/29/1999 | EP0707765A4 A method of detecting changes to a collection of digital signals |
| 12/29/1999 | CN1239787A Permit for controlling access to services in protected memory |
| 12/28/1999 | US6009528 Communication system and communication apparatus |
| 12/28/1999 | US6009177 Enhanced cryptographic system and method with key escrow feature |
| 12/28/1999 | US6009170 Method for appending a signal with ciphered playback mode information |
| 12/23/1999 | WO1999066669A2 Block ciphers with integer multiplication, data-dependent and fixed number of rotations in each round |
| 12/23/1999 | CA2335143A1 Enhanced block ciphers with data-dependent rotations |
| 12/23/1999 | CA2334922A1 Technique for securing a system configuration of a postage franking system |
| 12/22/1999 | EP0966139A2 Portable communication device and a method of transmitting information |
| 12/22/1999 | EP0966138A2 A portable communication device and a method of generating E-mail messages |
| 12/22/1999 | EP0965959A1 A method of using a portable communication device |
| 12/22/1999 | EP0965941A2 Electronic banking device |
| 12/22/1999 | EP0965940A2 Electronic banking device |
| 12/22/1999 | EP0965939A2 Electronic banking device |
| 12/22/1999 | EP0965938A2 Portable communication device |
| 12/22/1999 | EP0965917A1 Permit for controlling access to services in protected memory systems |
| 12/22/1999 | EP0965201A1 Secure proxy signing device and method for use |
| 12/22/1999 | EP0965111A2 Reliance server for electronic transaction system |
| 12/22/1999 | EP0965085A2 Personal computer and personal computer add-on card |
| 12/16/1999 | WO1999064995A1 Secure transaction system |
| 12/16/1999 | CA2299294A1 Secure transaction system |
| 12/15/1999 | EP0964388A2 Speaker collation apparatus, method and storage medium thereof |
| 12/15/1999 | EP0963637A2 Transmitting revisions with digital signatures |
| 12/15/1999 | EP0963635A1 Cyclotomic polynomial construction of discrete logarithm cryptosystems over finite fields |
| 12/15/1999 | EP0963634A1 Method and arrangement for computer assisted formation of a permutation to permute digital signals and method and arrangement to encrypt digital signals |
| 12/15/1999 | EP0792553B1 Method for certifying a copy of a document such as a fax |
| 12/15/1999 | CN1238886A Method of processing encrypted video data for generating decrypted program data |
| 12/15/1999 | CN1238885A Decoding apparatus/method and data format for processing and storing encrypted video data |
| 12/14/1999 | US6003153 Maximum likelihood detection method and information recording and reproducing apparatus |
| 12/14/1999 | US6002497 Three-line linear sensor |
| 12/09/1999 | WO1999063419A1 Method and device for processing data |
| 12/08/1999 | EP0962071A1 Method for authorization check |
| 12/08/1999 | EP0962070A2 Administration and utilization of secret fresh random numbers in a networked environment |
| 12/08/1999 | EP0962069A1 Cryptographic system comprising a ciphering and deciphering system and a key escrow system and associated appliances and devices |
| 12/07/1999 | US5999711 Method and system for providing certificates holding authentication and authorization information for users/machines |
| 12/07/1999 | US5999625 Method for electronic payment system with issuer control |
| 12/07/1999 | CA2169553C System and method for key distribution using quantum cryptography |
| 12/07/1999 | CA2169552C Key distribution in a multiple access network using quantum cryptography |
| 12/02/1999 | WO1999062221A1 Robust efficient distributed rsa-key generation |
| 12/02/1999 | WO1999062037A1 Terminal and system for implementing secure electronic transactions |
| 12/02/1999 | CA2330534A1 Terminal and system for implementing secure electronic transactions |
| 12/01/1999 | EP0961499A1 Predictive coding method and decoding method for dynamic image |
| 12/01/1999 | EP0961479A2 Digital image authentication system |
| 12/01/1999 | EP0961438A1 Authentication system, authentication device, authentication data producing device, and authentication method |
| 12/01/1999 | EP0880839A4 System for authenticating the location of remote users |
| 12/01/1999 | CN1237299A Methods and apparatus for enhanced CMEA including CMEA iteration preceded and followed by transformations and employing involuntary lookup |
| 11/30/1999 | USRE36417 Method of detecting changes to a collection of digital signals |
| 11/30/1999 | US5996111 Identification sequence issuing device and identification sequence verification device |
| 11/30/1999 | US5995629 Encoding device |
| 11/30/1999 | US5995626 Electronic shopping method, electronic shopping system and document authenticating method relating thereto |
| 11/30/1999 | US5995623 Information processing apparatus with a software protecting function |
| 11/30/1999 | CA2144124C Process and device for authentifying a data medium used to authorize a transaction or to authorize access to a service or a location, and related medium |
| 11/24/1999 | EP0959621A1 Video copy control with plural embedded signals |
| 11/24/1999 | EP0959620A1 Video with hidden in-band digital data |
| 11/24/1999 | EP0958676A1 Process for generating a digital signature and process for checking the signature |
| 11/24/1999 | EP0958675A1 Method for encrypting information represented as a numerical value |
| 11/24/1999 | EP0958672A1 Low power telecommunication controller for a host computer server |
| 11/24/1999 | EP0958671A1 A method of using transient faults to verify the security of a cryptosystem |
| 11/24/1999 | CN1236521A Method and apparatus for imprinting ID information into a digital content and for reading out the same |
| 11/24/1999 | CN1236517A Method and apparatus for encryption radio traffic in a telecommunications network |
| 11/24/1999 | CN1236516A Methods and apparatus for enhanced CMEA employing enhanced transformations |
| 11/24/1999 | CN1236450A Method and device for viewing electronic reading materials |
| 11/23/1999 | US5991406 System and method for data recovery |
| 11/23/1999 | US5991404 System for diversifying information in a network for distributing goods or services |
| 11/23/1999 | US5991402 Method and system of dynamic transformation of encrypted material |
| 11/18/1999 | WO1999059287A1 Method for secure distribution of data |
| 11/18/1999 | WO1999059286A1 Private key validity and validation |
| 11/18/1999 | WO1999045670A3 Mask generating polynomials for pseudo-random noise generators |
| 11/17/1999 | EP0956728A2 Method and apparatus for providing authentication security in a wireless communication system |
| 11/17/1999 | EP0956673A1 Method and system for processing electronic documents |
| 11/17/1999 | EP0676109A4 Method of extending the validity of a cryptographic certificate. |
| 11/17/1999 | EP0541727B1 Method for secure time-stamping of digital documents |
| 11/17/1999 | CN1235743A System for preventing electronic memory tampering |
| 11/17/1999 | CN1235448A Centralized certificate management system for two-way interactive communication devices in data networks |
| 11/16/1999 | US5987441 Token generation process in an open metering system |
| 11/16/1999 | US5987140 System, method and article of manufacture for secure network electronic payment and credit collection |
| 11/16/1999 | US5987139 Method for encryption of information |
| 11/16/1999 | US5987133 Electronic authentication system |
| 11/16/1999 | US5987124 Method and apparatus for encrypting long blocks using a short-block encryption procedure |
| 11/16/1999 | US5987123 Secure file system |
| 11/16/1999 | CA2169746C Method for key distribution using quantum cryptography |
| 11/11/1999 | WO1999057847A1 System and method for electronic transmission, storage and retrieval of authenticated documents |
| 11/11/1999 | WO1999057835A1 A cryptographic system and method for electronic transactions |
| 11/11/1999 | WO1999057689A1 Method for authenticating a chip card in a message transmission network |
| 11/11/1999 | DE19820605A1 Method for secure distribution of software |
| 11/11/1999 | DE19820422A1 Verfahren zur Authentisierung einer Chipkarte innerhalb eines Nachrichtenübertragungs-Netzwerks A method of authenticating a smart card within a message transmission network |