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)
12/2009
12/29/2009US7639811 Digital content encrypting apparatus and operating method thereof
12/29/2009US7639810 Digital content encrypting apparatus and operating method thereof
12/29/2009US7639808 Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem method, elliptic curve cryptosystem program and computer readable recording medium storing the elliptic curve cryptosystem program
12/29/2009US7639800 Data conversion device and data conversion method
12/29/2009CA2431504C System and method for trusted self-billing and payment for utilities including audit, verification, reconciliation and dispute resolution
12/24/2009US20090319790 Masked digital signatures
12/24/2009US20090316886 Fine-grained forward-secure signature scheme
12/23/2009CN100574408C Post decode watermarking of media
12/22/2009US7636846 Global conditional access system for broadcast services
12/22/2009US7636691 Method of controlling digital content distribution, a method of reproducing digital content, and an apparatus using the same
12/22/2009US7636440 Digital watermark with variable location
12/22/2009CA2320221C Secure one-way authentication communication system
12/22/2009CA2308170C Masked digital signatures
12/16/2009EP2133811A1 User authentication control device, user authentication device, data processing device, and user authentication control method and the like
12/16/2009CN100570631C Accessing control method, safe module retainer and safe module
12/15/2009US7634654 Method of nullifying digital certificate, apparatus for nullifying digital certificate, and system, program, and recoring medium for nullifying digital certificate
12/15/2009US7634084 Prime calculation device, method, and key issuing system
12/15/2009CA2359673C Self-generation of certificates using a secure microprocessor in a device for transferring digital information
12/10/2009WO2009147788A1 Encryption device and encryption system
12/10/2009WO2009116953A3 Method and system for embedding covert data in a text document using space encoding
12/09/2009CN100568320C Transmitting/receiving system and method, and transmitting/receiving apparatus and method
12/08/2009US7631358 Copy protection method for digital data stored on a medium
12/08/2009US7631318 Secure server plug-in architecture for digital rights management systems
12/08/2009US7630510 Image verification apparatus and image verification method
12/08/2009US7629609 Random number generating device
12/02/2009CN100566404C Moving image distribution system and method
12/02/2009CN100566341C Information-processing device and information-processing method
12/01/2009US7627905 Content transfer system, content transfer method, content transmitting apparatus, content transmission method, content receiving apparatus, content reception method, and computer program
12/01/2009US7627901 Systems and methods for improved media access control
12/01/2009US7627753 Secure digital data format and code enforced policy
12/01/2009US7627136 Information embedding device, information detecting device, information embedding and detecting system, information embedding method, information detecting method, information embedding program, information detecting program, information embedding and detecting program, and recording medium
11/2009
11/26/2009WO2009142285A1 Shared information creating device
11/26/2009WO2009142190A1 Coding or decoding circuit structure with error detecting capability
11/25/2009EP2124378A2 Method of and apparatus for encrypting signals for transmission
11/25/2009EP1018237B1 Method and system of dynamic transformation of encrypted material
11/25/2009EP0974913B1 Encryption/Decryption system
11/25/2009EP0971331B1 Method for arithmetic operation and recording medium of method of operation
11/25/2009CN100563242C Certificate information storage system and method
11/25/2009CN100562907C Chaotic signal generator for ultra wide band communication system
11/25/2009CN100562880C Backup management device, backup management method, integrated circuit, and backup system
11/24/2009US7624439 Authenticating resource requests in a computer system
11/24/2009US7624421 Method and apparatus for managing and displaying contact authentication in a peer-to-peer collaboration system
11/19/2009WO2009139650A1 A data obfuscation system, method, and computer implementation of data obfuscation for secret databases
11/19/2009WO2008133590A9 Method for establishing a random number for security and encryption, and a communications apparatus
11/18/2009EP2120387A2 Method and apparatus for encrypting signals for transmission
11/18/2009EP2120227A1 Cryptogram generating device, cryptogram communication system, and group parameter generating device
11/18/2009CN101582216A Method for inputting and authenticating passwords and device for inputting and authenticating passwords
11/18/2009CN101582107A Accessing memory in system with memory protection
11/18/2009CN100561546C Circle scattering migration code-transfer ciphering method
11/18/2009CN100561545C Password setting method
11/17/2009US7620813 Method to authenticate a data processing apparatus having a recording device and apparatuses therefor
11/17/2009US7620060 Method for automatically configuring terminal equipment
11/17/2009US7619755 Apparatus, method, system, and computer program for managing image processing
11/17/2009CA2441392C Encrypting apparatus
11/11/2009CN100559867C Partial encryption and PID mapping
11/11/2009CN100559746C Transmitting device and receiving device
11/11/2009CN100559486C Information processing device, program loading and renewal method, medium and circuit equipment
11/11/2009CN100559425C Encryption/decryption device and method
11/10/2009US7617536 Unauthorized device detection device, unauthorized device detection system, unauthorized device detection method, program, recording medium, and device information update method
11/10/2009US7617394 Authentication system
11/10/2009US7617392 System and method for manipulating a computer file and/or program
11/10/2009CA2330749C Private key validity and validation
11/05/2009US20090276628 Digital content decrypting apparatus and operating method thereof
11/05/2009US20090276627 Digital content decrypting apparatus and operating method thereof
11/05/2009US20090276619 Parallel distribution and fingerprinting of digital content
11/05/2009US20090274297 Digital content decrypting apparatus and operating method thereof
11/05/2009US20090274296 Digital content decrypting apparatus and operating method thereof
11/04/2009CN201340690Y Multi-layer rolling code encrypted circuit
11/03/2009US7613297 Method and apparatus for data encryption
10/2009
10/28/2009EP2112625A2 Methods for pre-processing and rearranging secure E-mail for exchange with a mobile data communication device
10/28/2009CN101567781A Sequence number encrypting method and cipher machine generated by sequencing
10/28/2009CN100555363C Encryption method, cryptogram decoding method, encryptor, cryptogram decoder, transmission/reception system, and communication system
10/27/2009US7610625 Program control system, program control method and information control program
10/27/2009US7610338 Communication contents certification system, communication contents certification apparatus, communication contents certification method, and recording medium
10/27/2009US7609838 Method of transmitting data in a network
10/22/2009WO2009128370A1 Block encryption device with adjustment values, encryption generation method, and recording medium
10/22/2009US20090262936 Digital content encrypting apparatus and operating method thereof
10/22/2009US20090262935 Digital content encrypting apparatus and operating method thereof
10/22/2009US20090262934 Digital content encrypting apparatus and operating method thereof
10/22/2009US20090262933 Digital content encrypting apparatus and operating method thereof
10/21/2009EP2110732A2 Systems and methods for secure transaction management and electronic rights protection
10/21/2009CN100553190C Digital two-way communication control device and its method
10/21/2009CN100552791C Content data recording apparatus with encryption by media ID
10/20/2009US7607176 Trainable rule-based computer file usage auditing system
10/20/2009US7606898 System and method for distributed management of shared computers
10/20/2009US7606369 Process for establishing a common cryptographic key for N subscribers
10/20/2009US7606368 Method and apparatus for data encryption
10/20/2009US7606365 Encryption/decryption system and key scheduler with variable key length
10/15/2009WO2009126345A1 Organic keyed encryption
10/15/2009WO2009125830A1 Information leak prevention device, and method and program thereof
10/15/2009WO2009125537A1 Signature and verification method, signature generation device, and signature verification device
10/15/2009US20090259840 Systems and methods for authenticating an electronic message
10/15/2009US20090257586 Image processing apparatus and image processing method
10/14/2009CN101558598A Combinational combiner cryptographic method
10/14/2009CN101556749A Encrypted stream processing circuit and method of processing encrypted stream
10/14/2009CN100550897C Apparatuses and methods for judging the validity of a server certificate
10/14/2009CN100550724C Information-processing apparatus, control method
10/14/2009CN100550083C Converting method for character string and method for forming and identifying intelligent net service card
10/13/2009US7603561 Methods and apparatus for input of coded image data
10/13/2009US7603554 Encryption communication system
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