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Class Information
Number: 380/281
Name: Cryptography > Key management > Key distribution > Key distribution center > Using master key (e.g., key-encrypting-key)
Description: Subject matter wherein a distributed short term key is protected by a separate private long term key.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8712056 Secure mobile ad hoc network Apr. 29, 2014
8707450 Digital rights management (DRM) locker Apr. 22, 2014
8681996 Asymmetric key wrapping using a symmetric cipher Mar. 25, 2014
8675878 Interoperable keychest for use by service providers Mar. 18, 2014
8661248 Method, apparatus, and system for sending and receiving security policy of multicast sessions Feb. 25, 2014
8654981 System and method for conditional access key encryption Feb. 18, 2014
8656159 Versioning of modifiable encrypted documents Feb. 18, 2014
8654974 Apparatus and method to provide secure communication over an insecure communication channel for location information using tracking devices Feb. 18, 2014
8645687 Electronic file access control system and method Feb. 4, 2014
8646054 Mechanism to manage access to user data area with bridged direct-attached storage devices Feb. 4, 2014
8640249 Digital broadcasting conditional access system and method Jan. 28, 2014
8638943 Communication device, communication method, communication system and service issuing method Jan. 28, 2014
8638939 User authentication on an electronic device Jan. 28, 2014
8638935 System and method for key space division and sub-key derivation for mixed media digital rights management content Jan. 28, 2014
8640210 Distributed computer systems with time-dependent credentials Jan. 28, 2014
8630416 Wireless device and method for rekeying with reduced packet loss for high-throughput wireless communications Jan. 14, 2014
8630422 Fully homomorphic encryption method based on a bootstrappable encryption scheme, computer program and apparatus Jan. 14, 2014
8625800 Portable secure element Jan. 7, 2014
8621595 System and method for authenticating a network gateway Dec. 31, 2013
8621243 Saving and retrieving data based on public key encryption Dec. 31, 2013
8619994 System and method for providing digital contents service Dec. 31, 2013
8619993 Content protection for OMA broadcast smartcard profiles Dec. 31, 2013
8615787 Secure internet transaction method and apparatus Dec. 24, 2013
8608064 Payment system and method of IC card and a multi-application IC card as well as a payment terminal Dec. 17, 2013
8612355 Digital rights management provision apparatus, system, and method Dec. 17, 2013
8607069 Data processing apparatus, data processing method, terminal unit, and transmission method of data processing apparatus Dec. 10, 2013
8594334 Key management method Nov. 26, 2013
8589698 Integrity service using regenerated trust integrity gather program Nov. 19, 2013
8588743 Communication device and communication system Nov. 19, 2013
8588425 Encryption key recovery in the event of storage management failure Nov. 19, 2013
8588424 Communication apparatus and communication method Nov. 19, 2013
8588420 Systems and methods for determining a time delay for sending a key update request Nov. 19, 2013
8582777 Method and system for lightweight key distribution in a wireless network Nov. 12, 2013
8583930 Downloadable conditional access system, secure micro, and transport processor, and security authentication method using the same Nov. 12, 2013
8582759 Method and apparatus for providing content service Nov. 12, 2013
8572389 System and method for protecting master encryption keys Oct. 29, 2013
8568226 Master control program for a gaming device Oct. 29, 2013
8572372 Method for selectively enabling access to file systems of mobile terminals Oct. 29, 2013
8571995 Purchase transaction system with encrypted payment card data Oct. 29, 2013
8571221 On-chip storage, creation, and manipulation of an encryption key Oct. 29, 2013
8571209 Recording keys in a broadcast-encryption-based system Oct. 29, 2013
8565436 Secure self managed data (SSMD) Oct. 22, 2013
8559631 Systems and methods for efficient decryption of attribute-based encryption Oct. 15, 2013
8560381 System and method for elections and government accountability Oct. 15, 2013
8560829 Method and system for command interface protection to achieve a secure interface Oct. 15, 2013
8553889 Mix-net system Oct. 8, 2013
8548171 Pair-wise keying for tunneled virtual private networks Oct. 1, 2013
8548172 Secure dissemination of events in a publish/subscribe network Oct. 1, 2013
8542593 System and methods for error tolerant content delivery over multicast channels Sep. 24, 2013
8533466 Electronic file access control system and method Sep. 10, 2013

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