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)
04/2003
04/22/2003US6553120 Method for data decorrelation
04/17/2003WO2003032608A1 Active intrusion resistant environment of layered object and compartment keys
04/17/2003WO2003032570A1 Secure printing of documents via a printer coupled to the internet
04/17/2003WO2002047081A9 System, method, and device for playing back recorded audio, video or other content from non-volatile memory cards, compact disks or other media
04/17/2003US20030074570 Address management system, interface ID setting processor, communication terminal, address management method, and computer program
04/17/2003US20030074382 Method and device for modulo calculation
04/17/2003US20030072453 Secure content distribution method and system
04/17/2003CA2463054A1 Active intrusion resistant environment of layered object and compartment keys
04/16/2003EP1303075A1 Data access management system and management method using access control ticket
04/16/2003EP1302047A2 Protocol for secure communication
04/16/2003EP1302021A1 Method for generating an electronic key from a prime number contained in a specific interval and device therefor
04/16/2003EP1183819A4 Multiple number base encoder/decoder using corresponding xor
04/16/2003CN1411207A Communication apparatus
04/15/2003US6550011 Media content protection utilizing public key cryptography
04/10/2003WO2003030445A1 A method for authenticating a user in a terminal, an authentication system, a terminal, and an authorization device
04/10/2003WO2003029341A1 Rubber composition comprising nitrile copolymer rubber, metal salt of ethylenically unsaturated carboxylic acid, and organic peroxide, and vulcanizate thereof
04/10/2003US20030069849 System for controlling the distribution and use of digital works using digital tickets
04/10/2003US20030069792 System and method for effecting secure online payment using a client payment card
04/10/2003US20030068045 Method and system for secure printing of documents via a printer coupled to the internet
04/10/2003US20030067474 Texturing system
04/09/2003EP1299797A2 Extending the range of computational fields of integers
04/09/2003EP1299786A2 Web site authentication using a digital hallmark
04/09/2003EP0739559B1 Method for key distribution using quantum cryptography
04/09/2003EP0737387B1 Identification/authentication coding method and apparatus
04/09/2003CN1409551A Peripheral device of portable audio-visual device and broadcast audio-visual system
04/09/2003CN1409234A Outward leakage preventing system for secrete information
04/08/2003US6546490 Signal transmision method
04/08/2003US6546104 Montgomery reduction apparatus
04/08/2003US6546006 Customer telecommunication interface device having a unique identifier
04/03/2003WO2003028286A1 Method for implementing in an electronic component a cryptographic algorithm for finding the public exponent
04/03/2003WO2003028281A2 A cryptosystem for data security
04/03/2003WO2003027800A2 Method and apparatus for secure mobile transaction
04/03/2003US20030065937 Outside leakage preventing system of confidential information
04/03/2003US20030065922 System and method of authenticating a digitally captured image
04/03/2003US20030065919 Method and system for identifying a replay attack by an access device to a computer system
04/03/2003US20030065799 Communication device
04/03/2003US20030065692 Zero-knowledge proving system and method
04/03/2003US20030063743 Device and method for increasing the reliability and constancy of a noise source
04/02/2003EP1298913A2 System and method of authenticating a digitally captured image
04/02/2003EP1298517A1 Information processing apparatus and methods
04/02/2003EP1298516A2 System for controlling the distribution and use of digital works utilizing a usage rights grammar
04/02/2003EP1297652A1 Improving des hardware throughput for short operations
04/02/2003EP1297504A1 Method and system for limiting the possibility of transforming data designed to constitute, in particular pre-payment tokens
04/02/2003EP1297405A2 Network enabled application software system and method
04/02/2003EP1025498B1 Method and apparatus for targeting a digital information playback device
04/02/2003EP0809905B1 Encoding device
04/02/2003CN1408154A Method, system and device for proving authenticity of entity and/or integrity and/or authenticity of message
04/02/2003CN1104699C Communication apparatus
04/01/2003US6542618 Methods for watermark decoding
04/01/2003US6542607 Device and method for the cryptographic processing of a digital data stream presenting any number of data
04/01/2003US6542261 Method and apparatus for sending or receiving a secure fax
04/01/2003CA2137616C Method and apparatus for controlling access to digital signals
03/2003
03/27/2003WO2003026260A1 Process, arrangement, devices for seizure of a shared telephone line
03/27/2003WO2003026242A1 A digital implementation of multi-channel demodulators
03/27/2003WO2003026207A2 Method and system for secure distribution of digital documents
03/27/2003WO2003025722A2 Virus detection system
03/27/2003WO2002084526A3 Content recording/playback apparatus, and recording medium storing program for content recording/playback
03/27/2003US20030061498 Portable data carrier provided with access protection by dividing up codes
03/27/2003US20030061250 Random number generating circuit
03/27/2003US20030059197 Peripheral for portable viewing apparatus and broadcasting viewing system
03/27/2003US20030059049 Method and apparatus for secure mobile transaction
03/27/2003US20030059044 Encryption apparatus
03/27/2003US20030059043 Elliptic curve signature verification method and apparatus and a storage medium for implementing the same
03/27/2003CA2460607A1 Virus detection system
03/26/2003EP1296224A1 Elliptic scalar multiplication system
03/26/2003EP1295267A2 An improved method and system for conducting secure payments over a computer network without a pseudo or proxy account number
03/26/2003EP1295207A1 Watermark detector
03/26/2003EP0872076B1 Process for the computer-controlled exchange of cryptographic keys between a first and a second computer unit
03/26/2003CN1406422A Content data transmitting device and method, and recording/reproducing device
03/26/2003CN1406024A Open secret-key base system, method, apparatus and programme
03/26/2003CN1405703A Convertor, converting method, enciphering/deciphering system, programme and recording medium
03/26/2003CN1104119C Apparatus and method for secure communication based on channel characteristics
03/26/2003CN1104118C Process for computer-controlled exchange of cryptographic keys between first and second computer unit
03/26/2003CN1104113C Method and device for detecting additional information signal and controller for recording information signal
03/25/2003US6539478 Method for performing remote operations
03/25/2003US6539095 Audio watermarking to convey auxiliary control information, and media embodying same
03/25/2003CA2358048A1 A cryptosystem for data security
03/25/2003CA2277761C Method for two party authentication and key agreement
03/20/2003WO2003023618A1 Encryption for a stream file in an fpga integrated circuit
03/20/2003WO2001092994A9 Method for biometric encryption of e-mail
03/20/2003US20030056221 Digital implementation of multi-channel demodulators
03/20/2003US20030056105 Processing copy protection signals
03/20/2003US20030056099 Public key infrastructure (PKI) based system, method, device and program
03/20/2003US20030053627 Random-number generation apparatus, random-number generation method, and random-number generation program
03/20/2003US20030053621 Modular exponential algorithm in an electronic component using a public key encryption algorithm
03/19/2003EP1293891A2 Arithmetic processor
03/19/2003EP1293873A2 System for controlling the distribution and use of digital works
03/19/2003EP1293872A2 System for controlling the distribution and use of digital works
03/19/2003EP1293871A2 System for controlling the distribution and use of digital works
03/19/2003EP1293870A2 System for controlling the distribution and use of composite digital works
03/19/2003EP1293869A2 System for controlling the distribution and use of composite digital works
03/19/2003EP1293868A2 System for controlling the distribution and use of digital works having a fee reporting mechanism
03/19/2003EP1293867A2 System for controlling the distribution and use of digital works having a fee reporting mechanism
03/19/2003EP1293866A2 System for controlling the distribution and use of digital works utilizing a usage rights grammar
03/19/2003EP1293865A2 System for controlling the distribution and use of digital works utilizing a usage rights grammar
03/19/2003EP1293864A2 System for controlling the distribution and use of digital works using digital tickets
03/19/2003EP1293863A2 System for controlling the distribution and use of digital works using digital tickets
03/19/2003EP1293862A2 System for controlling the distribution and use of digital works using digital tickets
03/19/2003EP1293861A2 System for controlling the distribution and use of digital works using digital tickets
03/19/2003EP1293860A2 System for controlling the distribution and use of digital works using digital tickets
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