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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
8315394 Techniques for encrypting data on storage devices using an intermediate key Nov. 20, 2012
8315393 System for on-line and off-line decryption Nov. 20, 2012
8315392 Method to secure access to audio/video content in a decoding unit Nov. 20, 2012
8315386 Method and apparatus for performing VoIP-based communication using bio keys Nov. 20, 2012
8312269 Challenge and response access control providing data security in data storage devices Nov. 13, 2012
8311225 Scalable key archival Nov. 13, 2012
8311223 Communication system, communication apparatus, display device, and communication method Nov. 13, 2012
8311214 Method for elliptic curve public key cryptographic validation Nov. 13, 2012
8307098 System, method, and program for managing a user key used to sign a message for a data processing system Nov. 6, 2012
8306227 Data encryption system and method Nov. 6, 2012
8301877 System and method for configuring a valid duration period for a digital certificate Oct. 30, 2012
8300831 Redundant key server encryption environment Oct. 30, 2012
8300828 System and method for a derivation function for key per page Oct. 30, 2012
8300827 Method and apparatus for updating key in an active state Oct. 30, 2012
8300826 Distributed information generation apparatus, reconstruction apparatus, reconstruction result verification apparatus, and secret information distribution system, method, and program Oct. 30, 2012
8300825 Data encryption and/or decryption by integrated circuit Oct. 30, 2012
8300824 System and method for encrypting data using a cipher text in a communications environment Oct. 30, 2012
8296575 Method for protecting electronic device, and electronic device Oct. 23, 2012
8296566 Method for session key derivation in an IC card Oct. 23, 2012
8296558 Method and apparatus for securing communication between a mobile node and a network Oct. 23, 2012
8295491 Method for aggregating data in a network Oct. 23, 2012
8295489 Method for sharing a link key in a ZigBee network and a communication system therefor Oct. 23, 2012
8295488 Exchange of key material Oct. 23, 2012
8291357 On-chip identification circuit incorporating pairs of conductors, each having an essentially random chance of being shorted together as a result of process variations Oct. 16, 2012
8291231 Common key setting method, relay apparatus, and program Oct. 16, 2012
8291227 Method and apparatus for secure communication Oct. 16, 2012
8291225 Communications apparatus, communications system, and method of setting certificate Oct. 16, 2012
8290871 Systems and methods for a secure recording environment Oct. 16, 2012
8290166 System and method for sending encrypted messages to a distribution list Oct. 16, 2012
8290165 Method and apparatus for cryptographic key storage wherein key servers are authenticated by possession and secure distribution of stored keys Oct. 16, 2012
8290164 Automatic recovery of TPM keys Oct. 16, 2012
8290157 Identification of a compromised content player Oct. 16, 2012
8290156 Communicating media content from a DVR to a portable device Oct. 16, 2012
8290151 Device and method for determining an inverse of a value related to a modulus Oct. 16, 2012
8286222 Authentication method for pharmaceutical products having coded packaging Oct. 9, 2012
8286001 Method and central processing unit for processing encrypted software Oct. 9, 2012
8285997 Backup apparatus with higher security and lower network bandwidth consumption Oct. 9, 2012
8285996 Verification of identity based signatures Oct. 9, 2012
8285993 System and method for establishing a shared secret among nodes of a security appliance Oct. 9, 2012
8285991 Electronically signing a document Oct. 9, 2012
8284942 Persisting private/public key pairs in password-encrypted files for transportation to local cryptographic store Oct. 9, 2012
8284937 Method for synchronization in encrypted communications using shared key Oct. 9, 2012
8281389 System and method for tamper evident certification Oct. 2, 2012
8281154 Encrypting data in volatile memory Oct. 2, 2012
8281143 Protecting against chosen plaintext attacks in untrusted storage environments that support data deduplication Oct. 2, 2012
8280048 Method for strengthening the implementation of ECDSA against power analysis Oct. 2, 2012
8280046 Method and system for deriving an encryption key using joint randomness not shared by others Oct. 2, 2012
8280041 Chinese remainder theorem-based computation method for cryptosystems Oct. 2, 2012
8275989 Method of negotiating security parameters and authenticating users interconnected to a network Sep. 25, 2012
8275134 Method for guaranteeing security of critical data, terminal and secured chip Sep. 25, 2012

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