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Class Information
Number: 380/277
Name: Cryptography > Key management
Description: Subject matter providing supervision or control of a signal necessary for encryption or decryption.










Sub-classes under this class:

Class Number Class Name Patents
380/44 Having particular key generator 1,724
380/278 Key distribution 1,332
380/286 Key escrow or recovery 461


Patents under this class:
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Patent Number Title Of Patent Date Issued
8009831 Method and system for hiding the decryption key in a dispersive way Aug. 30, 2011
8009829 Method and system for deploying advanced cryptographic algorithms Aug. 30, 2011
8009828 Integrated shuffle validity proving device, proof integrating device, integrated shuffle validity verifying device, and mix net system Aug. 30, 2011
8009827 Encryption processing method and encryption processing device Aug. 30, 2011
8006280 Security system for generating keys from access rules in a decentralized manner and methods therefor Aug. 23, 2011
8006102 Method and apparatus for transmitting content data and recording and/or reproducing apparatus Aug. 23, 2011
8006099 Security management method, program, and information device Aug. 23, 2011
8005227 Key information consistency checking in encrypting data storage system Aug. 23, 2011
8005225 Hierarchical threshold tree-based broadcast encryption method Aug. 23, 2011
8005212 Device and method for performing a cryptoalgorithm Aug. 23, 2011
7995765 Sharing a secret using hyperplanes over GF(q) Aug. 9, 2011
7995764 Sharing a secret using hyperplanes over GF(2.sup.m) Aug. 9, 2011
7995761 Data providing system, data receiving system, computer-readable recording medium storing data providing program, and computer-readable recording medium storing data receiving program Aug. 9, 2011
7995758 Family of encryption keys Aug. 9, 2011
7995753 Parallel cipher operations using a single data pass Aug. 9, 2011
7995552 Apparatus and method for transmitting TFCI bits for a hard split mode in a CDMA mobile communication system Aug. 9, 2011
7992193 Method and apparatus to secure AAA protocol messages Aug. 2, 2011
7991858 Method and device for establishing a route Aug. 2, 2011
7987360 Method for implementing grouping devices and interacting among grouped devices Jul. 26, 2011
7986944 Apparatus and method for receiving content rights through multimedia message in mobile communication terminal Jul. 26, 2011
7986940 Automatic wireless network linking method with security configuration and device thereof Jul. 26, 2011
7986787 System, method, and service for tracing traitors from content protection circumvention devices Jul. 26, 2011
7986786 Methods and systems for utilizing cryptographic functions of a cryptographic co-processor Jul. 26, 2011
7986785 Data management Jul. 26, 2011
7984497 System and method for binding a subscription-based computing system to an internet service provider Jul. 19, 2011
7984305 Encryption processing apparatus and encryption processing method for setting a mixed encryption processing sequence Jul. 19, 2011
7984025 Method for reencryption of a database Jul. 19, 2011
7983993 Authenticated payment Jul. 19, 2011
7983421 Methods to defend against tampering of audit records Jul. 19, 2011
7979722 Flash memory distribution of digital content Jul. 12, 2011
7979357 Electronic commerce method, electronic commerce system, certificate terminal, and principal certification method by agent Jul. 12, 2011
7979054 System and method for authenticating remote server access Jul. 12, 2011
7978858 Terminal device, group management server, network communication system, and method for generating encryption key Jul. 12, 2011
7978857 Secure device having key management function and information processing apparatus Jul. 12, 2011
7978856 Methods of managing a key cache Jul. 12, 2011
7978855 Method for allocating authorization key identifier for wireless portable internet system Jul. 12, 2011
7975312 Token passing technique for media playback devices Jul. 5, 2011
7975150 Method and system for protecting queryable data Jul. 5, 2011
7974540 Communication system and communication method using the same Jul. 5, 2011
7974416 Providing a secure execution mode in a pre-boot environment Jul. 5, 2011
7974415 System and method for updating keys used for public key cryptography Jul. 5, 2011
7971240 Session key security protocol Jun. 28, 2011
7970143 System, method and apparatus to obtain a key for encryption/decryption/data recovery from an enterprise cryptography key management system Jun. 28, 2011
7970142 System, method and apparatus for decrypting data stored on removable media Jun. 28, 2011
7970141 Method and apparatus for tracing the source of decryption keys used by a decoder Jun. 28, 2011
7970135 Method for the secure, distributed generation of an encryption key Jun. 28, 2011
7970133 System and method for secure and flexible key schedule generation Jun. 28, 2011
7970132 Reduced hierarchy key management system and method Jun. 28, 2011
7966662 Method and system for managing authentication and payment for use of broadcast material Jun. 21, 2011
7965858 Data processing apparatus and method Jun. 21, 2011

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