| 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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| 11/10/1999 | EP0954809A1 A digital trust center for medical image authentication |
| 11/10/1999 | CN1234574A Integrated circuit and smart card comprising such circuit |
| 11/09/1999 | US5982900 Circuit and system for modulo exponentiation arithmetic and arithmetic method of performing modulo exponentiation arithmetic |
| 11/09/1999 | US5982891 Systems and methods for secure transaction management and electronic rights protection |
| 11/09/1999 | US5982887 Encrypted program executing apparatus |
| 11/03/1999 | EP0953244A1 Constructing symmetric ciphers using the cast design procedure |
| 11/02/1999 | US5978485 Foreign exchange transaction system |
| 11/02/1999 | CA2168851C System and method for quantum cryptography |
| 10/28/1999 | WO1999034552A9 Cryptographic system and method with fast decryption |
| 10/28/1999 | WO1999025071A3 Distributed service network |
| 10/27/1999 | EP0952728A2 Method and apparatus for watermarking data sets |
| 10/27/1999 | EP0952697A2 Elliptic curve encryption method and system |
| 10/26/1999 | US5974550 Method for strongly authenticating another process in a different address space |
| 10/26/1999 | US5974250 System and method for secure information transmission over a network |
| 10/21/1999 | WO1999046660A3 System and method for backing up computer files over a wide area computer network |
| 10/20/1999 | EP0951158A2 System and method for controlling transmission of stored information to internet websites |
| 10/20/1999 | EP0950303A1 Method and system for ensuring the security of the remote supply of services of financial institutions |
| 10/20/1999 | EP0950302A1 Public key cryptographic apparatus and method |
| 10/20/1999 | CN1232588A Public key cryptosystem method and apparatus |
| 10/14/1999 | WO1999052241A2 Generating rsa moduli including a predetermined portion |
| 10/13/1999 | EP0949823A1 Synchronization arrangement for a compressed video signal |
| 10/13/1999 | EP0949563A2 A method for generating pseudo-random numbers |
| 10/13/1999 | EP0667998B1 Method and apparatus for authentication of client server communication |
| 10/12/1999 | US5966449 Communication method |
| 10/12/1999 | US5966448 Cryptographic communication system |
| 10/12/1999 | US5966445 Computer implemented method |
| 10/07/1999 | WO1999049717A2 System and method for multicasting multimedia content |
| 10/07/1999 | WO1999034548A3 System and method for deriving an appropriate initialization vector for secure communications |
| 10/07/1999 | WO1999007145A9 Verification of the source of program of information in a conditional access system |
| 10/07/1999 | CA2287417A1 System and method for multicasting multimedia content |
| 10/06/1999 | EP0947915A1 High speed Montgomery value calculation |
| 10/06/1999 | EP0947914A1 Computationally efficient modular multiplication method and apparatus |
| 10/06/1999 | EP0860064A4 Parameterized hash functions for access control |
| 10/06/1999 | EP0734624A4 A non-deterministic public key encryption system |
| 10/06/1999 | CN1230738A Article truth identifying system |
| 10/05/1999 | US5963642 Method and apparatus for secure storage of data |
| 10/05/1999 | US5961578 Data processor and microcomputer |
| 10/05/1999 | CA2187035C Computer network cryptographic key distribution system |
| 09/30/1999 | WO1999049614A1 Authentification of data in a digital transmission system |
| 09/30/1999 | WO1999049612A1 Implicit certificate scheme |
| 09/30/1999 | WO1999049386A1 Accelerated finite field operations on an elliptic curve |
| 09/30/1999 | CA2251178A1 Computationally efficient modular multiplication method and apparatus |
| 09/30/1999 | CA2251162A1 High speed montgomery value calculation |
| 09/29/1999 | EP0946019A1 Authentification of data in a digital transmission system |
| 09/29/1999 | EP0944975A1 Novel digital cryptography method by selector box |
| 09/29/1999 | CN1230324A Enhanced short message and method for synchronising and ensuring security of enhanced short messages exchanged in cellular radio communication system |
| 09/28/1999 | US5958051 Implementing digital signatures for data streams and data archives |
| 09/23/1999 | WO1999048242A1 Procedure and system for reliable and safe identification of a contracting party |
| 09/23/1999 | WO1999048053A1 System and method for management of postage meter licenses |
| 09/23/1999 | CA2324240A1 Procedure and system for reliable and safe identification of a contracting party |
| 09/23/1999 | CA2324099A1 System and method for management of postage meter licenses |
| 09/22/1999 | EP0944202A2 Method and apparatus for thwarting a cryptographic attack |
| 09/22/1999 | EP0942856A1 Process for securing the privacy of data transmission |
| 09/22/1999 | EP0856225B1 Encryption and decryption of multi-media data |
| 09/22/1999 | CN1229551A Method and apparatus for enhanced security expansion of secret key into lookup table for improved security for wireless telephone messages |
| 09/21/1999 | US5956034 Method and apparatus for viewing electronic reading materials |
| 09/21/1999 | US5954817 Apparatus and method for securing electronic information in a wireless communication device |
| 09/16/1999 | WO1999046660A2 System and method for backing up computer files over a wide area computer network |
| 09/16/1999 | WO1999035785A3 Transmitting revisions with digital signatures |
| 09/16/1999 | WO1999035586A3 Personal computer and personal computer add-on card |
| 09/16/1999 | WO1999034552A3 Cryptographic system and method with fast decryption |
| 09/16/1999 | DE19811175A1 Verfahren und Anordnung zur Abwehr kryptoanalytischer Untersuchungen Method and system for defense against cryptanalytic research |
| 09/16/1999 | CA2323522A1 System and method for backing up computer files over a wide area computer network |
| 09/15/1999 | EP0942568A2 Centralized cerificate management system for two-way interactive communication devices in data networks |
| 09/15/1999 | EP0941611A1 A decoding apparatus/method and data format for processing and storing encrypted video data |
| 09/15/1999 | EP0941610A1 Method of processing encrypted video data for generating decrypted program data |
| 09/15/1999 | EP0741935A4 Apparatus and method for controlling access to and interconnection of computer system resources |
| 09/15/1999 | EP0708949B1 Method for the production of a key common to two devices for implementing a common cryptographic procedure and associated apparatus |
| 09/14/1999 | US5953416 Data processing apparatus |
| 09/14/1999 | US5953005 System and method for on-line multimedia access |
| 09/14/1999 | CA2150681C A method and apparatus for generating a cipher stream |
| 09/14/1999 | CA2138919C Electronic signature method and apparatus |
| 09/10/1999 | WO1999045673A1 Pseudo-random sequence generator and associated method |
| 09/10/1999 | WO1999045670A2 Mask generating polynomials for pseudo-random noise generators |
| 09/10/1999 | WO1999035799A3 A method for packet authentication in the presence of network address translations and protocol conversions |
| 09/10/1999 | WO1999034554A3 Administration and utilization of secret fresh random numbers in a networked environment |
| 09/08/1999 | EP0940945A2 A method and apparatus for certification and safe storage of electronic documents |
| 09/08/1999 | EP0940943A2 Method and apparatus for data encryption |
| 09/08/1999 | EP0940675A1 Method and system for authentication and electronic signature |
| 09/08/1999 | EP0940021A1 Method for signing and/or authenticating electronic messages |
| 09/08/1999 | CN1228183A Cipher processor, IC card and cipher processing method |
| 09/07/1999 | US5949876 Systems and methods for secure transaction management and electronic rights protection |
| 09/07/1999 | US5948103 Electronic document security system, affixed electronic seal security system and electronic signature security system |
| 09/07/1999 | CA2150683C A cryptographic method |
| 09/02/1999 | WO1999044332A1 Method and device for securing access to a service in a telecommunications network |
| 09/02/1999 | WO1999044330A1 Method for the block-encryption of discrete data |
| 09/02/1999 | WO1999044329A2 Encryption processor with shared memory interconnect |
| 09/01/1999 | EP0939552A2 Scrambler, descrambler and recording medium |
| 09/01/1999 | EP0938807A1 Method and apparatus for imprinting id information into a digital content and for reading out the same |
| 09/01/1999 | EP0938790A2 A method and device for executing a decrypting mechanism through calculating a standardized modular exponentiation for thwarting timing attacks |
| 09/01/1999 | EP0717898A4 A method of messaging in a communication system |
| 09/01/1999 | CN1227686A Process for cryptographic code management between a first computer unit and a second computer unit |
| 08/31/1999 | US5946397 Method of cryptography with public key based on the discrete logarithm |
| 08/26/1999 | WO1999043124A1 Elliptic curve cryptographic process and device for a computer |
| 08/26/1999 | CA2321478A1 Method and device for cryptographic processing with the aid or an elliptic curve on a computer |
| 08/25/1999 | EP0937348A1 System and method for providing security in data communication systems |
| 08/24/1999 | US5943615 Method and apparatus for providing authentication security in a wireless communication system |
| 08/24/1999 | CA2120678C Method for protecting a volatile file using a single hash |
| 08/19/1999 | WO1999041907A1 Method and apparatus for recording of encrypted digital data |
| 08/19/1999 | WO1999041834A1 Method of and apparatus for generating random numbers |