| 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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| 05/06/1998 | EP0840478A2 Digital signature generating/verifying method and system using public key encryption |
| 05/06/1998 | EP0840194A2 System and method for controlling the use of a package of distributed application software |
| 05/06/1998 | EP0839418A1 Cryptographic method and apparatus for non-linearly merging a data block and a key |
| 05/06/1998 | EP0691055A4 Two-way public key authentication and key agreement for low-cost terminals |
| 05/06/1998 | CN1180865A Authentication method, communication method, and information processing apparatus |
| 05/05/1998 | US5748782 Device for implementing a message signature system and chip card comprising such a device |
| 05/05/1998 | US5748763 Image steganography system featuring perceptually adaptive and globally scalable signal embedding |
| 05/05/1998 | US5748740 Method, apparatus, system and firmware for secure transactions |
| 05/05/1998 | US5748738 System and method for electronic transmission, storage and retrieval of authenticated documents |
| 04/29/1998 | EP0838930A2 Pseudo network adapter for frame capture, encapsulation and encryption |
| 04/28/1998 | US5745578 Apparatus and method for secure communication based on channel characteristics |
| 04/28/1998 | US5745573 Data recovery center |
| 04/28/1998 | US5745571 Cryptographic communications method and system |
| 04/28/1998 | US5745398 Method for the implementation of modular multiplication according to the Montgomery method |
| 04/22/1998 | EP0837383A2 Method and apparatus for data verification |
| 04/22/1998 | EP0836773A1 Handheld remote computer control and methods for secured interactive real-time telecommunications |
| 04/22/1998 | EP0836731A1 Value transfer system |
| 04/21/1998 | US5742759 Method and system for facilitating access control to system resources in a distributed computer system |
| 04/21/1998 | US5742682 Method of manufacturing secure boxes in a key management system |
| 04/21/1998 | US5742530 Compact microelectronic device for performing modular multiplication and exponentiation over large numbers |
| 04/21/1998 | US5742035 Memory aiding device for credit card pin numbers |
| 04/15/1998 | EP0835572A1 Restritedly blindable certificates on secret keys |
| 04/14/1998 | US5740250 Tame automorphism public key system |
| 04/14/1998 | US5740248 Software level touchpoints for an international cryptography frameworks |
| 04/14/1998 | US5740244 Method and apparatus for improved fingerprinting and authenticating various magnetic media |
| 04/08/1998 | EP0834238A1 Process and device for transmitting confidential connection and service information between subscriber terminals and one or more digital exchanges |
| 04/08/1998 | CN1178619A Asymmetrical cryptographic communication method and portable object therefor |
| 04/07/1998 | US5737523 In a distributed file system computing environment |
| 04/07/1998 | US5737415 Data management module, data reproduction management device and data reproduction management system |
| 04/02/1998 | WO1998013971A1 Method and system for ensuring the security of the remote supply of services of financial institutions |
| 04/02/1998 | WO1997043761A3 Cryptographic methods, apparatus and systems for storage media electronic rights management in closed and connected appliances |
| 04/01/1998 | EP0833285A2 Method and product for generating electronic tokens |
| 04/01/1998 | EP0833241A2 Secure data management system |
| 04/01/1998 | EP0832542A1 Process and device for authenticating subscribers to digital exchanges |
| 04/01/1998 | EP0832532A1 Videophone interactive mailbox facility system and method of processing information |
| 03/31/1998 | US5734820 Security apparatus and method for a data communications system |
| 03/31/1998 | US5734718 For updating passwords in a name service device |
| 03/31/1998 | US5733047 Enciphering system applicable to various keyless entry systems |
| 03/31/1998 | CA2130396C Method and system for key distribution and authentication in a data communication network |
| 03/31/1998 | CA2075329C Public key cryptosystem key management based on control vectors |
| 03/25/1998 | EP0830774A2 Internet server access control and monitoring systems |
| 03/25/1998 | CN1177245A Enciphering method, deciphering method and certifying method |
| 03/24/1998 | US5732137 Method and apparatus for secure remote authentication in a public network |
| 03/19/1998 | WO1998011690A1 Self-decrypting digital information system and method |
| 03/18/1998 | EP0829991A2 Methods and apparatus for sending electronic data signals |
| 03/18/1998 | EP0829069A1 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 |
| 03/18/1998 | EP0829056A1 Secure method and system for communicating a list of credit card numbers over a non-secure network |
| 03/17/1998 | US5729609 Method for producing a common key in two devices, in order to implement a common cryptographic procedure, and associated apparatus |
| 03/17/1998 | US5729608 Method and system for providing secure key distribution in a communication system |
| 03/12/1998 | WO1998010611A2 System for preventing electronic memory tampering |
| 03/12/1998 | WO1998010561A1 Method and apparatus for encrypting radio traffic in a telecommunications network |
| 03/12/1998 | WO1998010559A1 Device and method for the cryptographic processing of a digital data stream presenting any number of data |
| 03/11/1998 | EP0828210A2 Method and apparatus for cryptographically protecting data |
| 03/11/1998 | EP0828208A2 Application certification for an international cryptography framework |
| 03/10/1998 | US5727064 Cryptographic system for wireless communications |
| 03/10/1998 | US5727063 Pseudo-random generator |
| 03/04/1998 | EP0827329A1 Validation stamps for electronic signatures |
| 03/04/1998 | EP0827318A2 Telephone commerce |
| 03/04/1998 | EP0783741B1 Data transfer system comprising a terminal and a portable data carrier and method of recharging the portable data carrier by means of the terminal |
| 03/04/1998 | CN1175142A Coditional access system adapting information with multiple encryted code |
| 03/03/1998 | US5724427 Method and apparatus for autokey rotor encryption |
| 03/03/1998 | US5724426 Apparatus and method for controlling access to and interconnection of computer system resources |
| 03/03/1998 | US5724423 Method and apparatus for user authentication |
| 03/03/1998 | US5724092 Videophone interactive mailbox facility system and method of processing information |
| 02/26/1998 | WO1998008344A2 Method and apparatus for viewing electronic reading materials |
| 02/26/1998 | WO1998008323A1 Public key cryptosystem method and apparatus |
| 02/26/1998 | WO1997046983A3 Method and device for loading input data into an algorithm during authentication |
| 02/26/1998 | CA2263356A1 Method and apparatus for viewing electronic reading materials |
| 02/25/1998 | EP0825512A2 Method and apparatus for enforcing the use of cryptography in an international cryptography framework |
| 02/25/1998 | EP0825511A2 Method and apparatus for trusted processing |
| 02/25/1998 | CN1174642A Digital document authentication system for providing certificate which authenticates and uniquely identifies document |
| 02/25/1998 | CN1174641A Encoding device |
| 02/24/1998 | US5721780 User-transparent security method and apparatus for authenticating user terminal access to a network |
| 02/19/1998 | WO1998007253A1 Accelerating public-key cryptography by precomputing randomly generated pairs |
| 02/19/1998 | WO1998007251A1 Improved cryptographically secure pseudo-random bit generator for fast and secure encryption |
| 02/17/1998 | US5720012 Security module for a printing apparatus |
| 02/17/1998 | US5719940 Method for providing information security by exchanging authentication and signing an electronic signature and apparatus therefor |
| 02/17/1998 | US5719938 Methods for providing secure access to shared information |
| 02/12/1998 | DE19701161A1 Maximum likelihood detection method for magnetic disc |
| 02/11/1998 | EP0823802A2 Secret communication and authentication scheme based on public key cryptosystem using N-adic expansion |
| 02/10/1998 | US5717760 Message protection system and method |
| 02/10/1998 | US5717756 System and method for providing masquerade protection in a computer network using hardware and timestamp-specific single use keys |
| 02/05/1998 | WO1998005143A1 Cryptographic key recovery system |
| 02/05/1998 | WO1998004966A1 System for secure data storage on cd-rom |
| 02/04/1998 | EP0822720A1 Conditional access system using messages with multiple encryption keys |
| 02/04/1998 | EP0821853A1 Method and apparatus for high speed block ciphering of packet data |
| 02/04/1998 | EP0681768A4 A method and apparatus for generating a cipher stream. |
| 02/04/1998 | CN1172390A Circuit and system for modulo exponentiation arithmetic and airthmetic method fo performing modulo exponentiation arithmetic |
| 02/03/1998 | US5715403 System for controlling the distribution and use of digital works having attached usage rights where the usage rights are defined by a usage rights grammar |
| 02/03/1998 | US5715399 Secure method and system for communicating a list of credit card numbers over a non-secure network |
| 02/03/1998 | US5715164 System and method for communications with postage meters |
| 01/29/1998 | WO1998004061A1 Method and apparatus for a cryptographically-assisted commercial network system designed to facilitate and support expert-based commerce |
| 01/29/1998 | WO1998003955A1 Digital data shuffling/deshuffling system |
| 01/28/1998 | EP0820670A1 Computer-assisted method for the exchange of cryptographic keys between a user computer unit (u) and network computer unit (n) |
| 01/28/1998 | CN1171682A Data encrypting method and equipment |
| 01/27/1998 | US5712627 Security system |
| 01/22/1998 | WO1998003026A1 Enhanced short message and method for synchronising and ensuring security of enhanced short messages exchanged in a cellular radio communication system |
| 01/22/1998 | CA2259287A1 Enhanced short message and method for synchronising and ensuring security of enhanced short messages exchanged in a cellular radio communication system |
| 01/21/1998 | EP0820169A2 System for information diversification in a distribution network for products or services |
| 01/21/1998 | EP0819346A1 Digital document authentication system for providing a certificate which authenticates and uniquely identifies a document |