Patents
Sitemap › G09 - Educating; Cryptography; Display; Advertising; Seals › G09C - Ciphering or deciphering apparatus for cryptographic or other purposes involving the need for secrecy › 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
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)
12/2000
12/21/2000WO2000052866A3 Portable electronic charge and authorization devices and methods therefor
12/20/2000EP1060591A1 Pseudo-random sequence generator and associated method
12/20/2000EP0832532A4 Videophone interactive mailbox facility system and method of processing information
12/19/2000US6163843 Packet inspection device, mobile computer and packet transfer method in mobile computing with improved mobile computer authenticity check scheme
12/19/2000US6163790 Modular arithmetic coprocessor comprising an integer division circuit
12/19/2000US6163612 Coding device, decoding device and IC circuit
12/19/2000CA2179691C Cryptographic apparatus with double feedforward hash function
12/14/2000WO2000075761A1 Robust random number generator
12/14/2000WO2000075750A2 Parameter generation using elementary register operations
12/14/2000WO2000045241A3 Self-generation of certificates using a secure microprocessor in a device for transferring digital information
12/14/2000CA2372996A1 Robust random number generator
12/13/2000EP1059760A1 Method for the block-encryption of discrete data
12/13/2000EP1059597A2 A system and method for doing electronic commerce
12/13/2000EP1058982A1 Method and device for securing access to a service in a telecommunications network
12/13/2000EP0903026B1 Method for negotiating a security policy between a first and a second computer unit
12/13/2000EP0815670A4 Multi-purpose transaction card system
12/13/2000EP0691055B1 Two-way public key authentication and key agreement for low-cost terminals
12/12/2000US6161183 Data verifying method apparatus for creating data to be verified and data verifying apparatus
12/07/2000WO2000074300A1 System and method for delivering and examining digital tickets
12/06/2000EP1058429A1 Communication system and communication method
12/06/2000EP1057095A1 Transmitting reviews with digital signatures
12/05/2000US6158005 Cloning protection scheme for a digital information playback device
12/05/2000US6157953 Authentication and access control in a management console program for managing services in a computer network
12/05/2000US6157720 Method and apparatus for encrypting data
12/05/2000CA2024641C Method and apparatus for encrypting and decrypting time domain signals
11/2000
11/30/2000WO2000072500A2 Information encryption system and method
11/29/2000EP1056043A2 Video recording and reproducing apparatus and method with data modification detection
11/29/2000EP1055306A1 Cryptographic device with encryption blocks connected in parallel
11/29/2000EP1055286A1 Method of and apparatus for generating random numbers
11/29/2000EP1055203A1 Protocol between an electronic key and an lock
11/29/2000EP1055176A2 Access control system
11/29/2000EP0746923A4 Efficient electronic money
11/29/2000CN2407993Y Time limited anti-theft device for leasing car
11/29/2000CN1274922A Content information recording method and device
11/28/2000US6154775 Methods and apparatus for a computer network firewall with dynamic rule processing with the ability to dynamically alter the operations of rules
11/23/2000WO2000070429A1 Public cryptographic control unit and system therefor
11/23/2000CA2371452A1 Cryptographic engine using base conversion, logic operations and prng in data arrays to increase dispersion in ciphertext
11/23/2000CA2371446A1 Multiple number base encoder/decoder using corresponding xor
11/22/2000EP1054398A2 Contents information recording method and contents information recording unit
11/22/2000EP1054314A2 Information processing apparatus, information processing method and providing medium
11/21/2000US6151676 Administration and utilization of secret fresh random numbers in a networked environment
11/21/2000US6151675 Method and apparatus for effecting secure document format conversion
11/21/2000US6151393 Device and method for modular multiplication
11/21/2000CA2192515C Identification number issuing device and identification number verification device
11/16/2000WO2000069206A1 Integrity protection method for radio network signaling
11/16/2000WO2000068806A1 Authenticating/managing apparatus
11/16/2000WO2000048355A3 Method for verifying the use of public keys generated by an on-board system
11/16/2000WO2000008909A3 System for tracking end-user electronic content usage
11/16/2000DE19921852A1 Pseudozufallszahlgenerator Pseudo-random number generator
11/15/2000EP1052569A2 Pseudorandom number generator
11/15/2000EP1051824A1 System for transmitting subscription information and content to a mobile device
11/15/2000EP0407465B1 One-show blind signature systems
11/15/2000CN1273490A Cipher method and device for limitting inserting transfered program content
11/14/2000US6148405 Method and system for secure lightweight transactions in wireless data networks
11/14/2000US6148084 Restrictedly blindable certificates on secret keys
11/14/2000US6148083 Application certification for an international cryptography framework
11/09/2000WO2000067423A1 Public-key signature methods and systems
11/08/2000EP1051036A2 Cryptographic method and apparatus for restricting access to transmitted programming content using hash functions and program identifiers
11/08/2000EP1051011A2 System for preventing an illegal copy of digital contents
11/08/2000EP1051009A1 Virtual server providing security services
11/08/2000EP1050789A2 System and method for authentication seed distribution
11/08/2000EP1050134A1 Secure one-way authentication communication system
11/08/2000EP1049989A1 Access to content addressable data over a network
11/08/2000EP1049988A1 Content addressable information encapsulation, representation, and transfer
11/08/2000CN1272734A System for preventing illegal copy digital content
11/07/2000US6144946 Accounting device, communicating apparatus, and communication system
11/07/2000US6144927 Data transmission device for a motor vehicle, comprising a pulse generator and a monitoring unit, as well as a pulse generator for the monitoring unit
11/07/2000US6144848 Handheld remote computer control and methods for secured interactive real-time telecommunications
11/07/2000CA2307157A1 Cryptographic method and apparatus for restricting access to transmitted programming content using hash functions and program identifiers
11/06/2000CA2306677A1 Information processing system permitting secure communications between software components
11/02/2000WO2000065768A1 Method and device for effective key length control
11/02/2000WO2000065767A1 Method for encrypting information and device for realization of the method
11/02/2000WO2000027069A9 Incorporating shared randomness into distributed cryptography
11/02/2000EP1049292A2 System and method for network monitoring
11/02/2000EP1049289A1 Public-key signature methods and systems
11/02/2000EP1049288A2 Pseudo-noise sequence
11/02/2000EP1049014A2 File signature check
11/02/2000EP1048143A1 Method and apparatus for secure cryptographic key storage, certification and use
11/02/2000EP1048141A2 Method for generating asymmetrical cryptographic keys by the user
11/02/2000EP0907269A4 Encryption device for information in binary code
11/01/2000CN1271907A Sentence informance recording method and sentence informance processing device
10/2000
10/31/2000US6141668 Pseudo-random number generating method and apparatus therefor
10/31/2000US6141423 Method for preventing inadvertent betrayal by a trustee of escrowed digital secrets
10/31/2000US6141421 Method and apparatus for generating hash value
10/26/2000WO2000064122A1 Monitoring integrity of transmitted data
10/26/2000WO2000064097A1 Signature verification and authentication method
10/26/2000WO2000064094A1 Method and device for inserting and authenticating a digital signature in digital data
10/26/2000WO2000063854A1 Communication system and method for efficiently implementing electronic transactions in mobile communication networks
10/26/2000CA2383536A1 Method and device for inserting and authenticating a digital signature in digital data
10/25/2000EP1047062A2 Contents information recording method, contents information processing unit, contents information deciphering method, contents information deciphering unit and media thereof
10/25/2000EP1047028A1 Communication system and method for efficiently processing electronical transactions in mobile communication networks
10/25/2000EP1046277A1 Method for confirming the integrity of an image transmitted with a loss
10/25/2000EP1046255A1 Method and system for consumer electronic device certificate management
10/25/2000EP1046169A1 System and method for copy protection for digital signals
10/25/2000EP1046168A1 Electronic bookshelf with multi-user features
10/25/2000EP1046142A1 Data processing device and method for operating same which prevents a differential current consumption analysis
10/25/2000EP1046131A1 Data processing device and operating method for preventing a differential current consumption analysis
10/24/2000US6138239 Method and system for authenticating and utilizing secure resources in a computer system
10/19/2000WO2000062540A1 Method of and apparatus for providing secure communication of digital data between devices
10/19/2000WO2000062505A1 Digital home network and method for creating and updating such a network
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