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Class Information
Number: 380/285
Name: Cryptography > Key management > Key distribution > User-to-user key distributed over data link (i.e., no center) > By public key method
Description: Subject matter wherein a distributed key is protected by a public key algorithm.










Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
7631183 System and method for retrieving related certificates Dec. 8, 2009
7610484 Customizable public key infrastructure and development tool for same Oct. 27, 2009
7599493 Asymmetric key pair having a kiosk mode Oct. 6, 2009
7596692 Cryptographic audit Sep. 29, 2009
7596697 Technique for providing multiple levels of security Sep. 29, 2009
7590236 Identity-based-encryption system Sep. 15, 2009
7564977 System, method and program product for anonymous transfer of messages Jul. 21, 2009
7562223 Multifunction device with secure job release Jul. 14, 2009
7557941 Use of variant and base keys with three or more entities Jul. 7, 2009
7548620 Token provisioning Jun. 16, 2009
7549172 Data processing apparatus for digital copyrights management Jun. 16, 2009
7545930 Portable terminal Jun. 9, 2009
7539869 System and methods for using a signature protocol by a nonsigning client May. 26, 2009
7522731 Wireless service points having unique identifiers for secure communication Apr. 21, 2009
7522727 Method and apparatus for providing authentication in a communication system Apr. 21, 2009
7516482 Secure hierarchical namespaces in peer-to-peer networks Apr. 7, 2009
7509492 Distributed scalable cryptographic access control Mar. 24, 2009
7499551 Public key infrastructure utilizing master key encryption Mar. 3, 2009
7493661 Secure transmission system Feb. 17, 2009
7493429 Communication of information via a side-band channel, and use of same to verify positional relationship Feb. 17, 2009
7478238 Access control for digital video stream data Jan. 13, 2009
7475247 Method for using a portable computing device as a smart key device Jan. 6, 2009
7472276 Data card verification system Dec. 30, 2008
7461406 Access control for digital content Dec. 2, 2008
7460683 Asymmetric spread-spectrum watermarking systems and methods of use Dec. 2, 2008
7457430 Asymmetric spread-spectrum watermarking systems and methods of use Nov. 25, 2008
7454021 Off-loading data re-encryption in encrypted data management systems Nov. 18, 2008
7450723 Method and system for providing for security in communication Nov. 11, 2008
7440571 Method for securing software updates Oct. 21, 2008
7437568 Apparatus and method for establishing trust Oct. 14, 2008
7436966 Secure approach to send data from one system to another Oct. 14, 2008
7424114 Method for enhancing security of public key encryption schemas Sep. 9, 2008
7421741 Securing digital content system and method Sep. 2, 2008
7418474 Secure identification system Aug. 26, 2008
7415614 Cryptographic authentication with ephemeral modules Aug. 19, 2008
7412062 Method and apparatus for elliptic curve scalar multiplication Aug. 12, 2008
7409061 Method and system for secure distribution of subscription-based game software Aug. 5, 2008
7409553 Public key certificate generation method, validation method and apparatus thereof Aug. 5, 2008
7397922 Group security Jul. 8, 2008
7372965 Electric circuit management method and device May. 13, 2008
7373507 System and method for establishing secure communication May. 13, 2008
7366897 Method and system for communication via a computer network Apr. 29, 2008
7366911 Methods and apparatus for computationally-efficient generation of secure digital signatures Apr. 29, 2008
7363496 Authenticated ID-based cryptosystem with no key escrow Apr. 22, 2008
7360240 Portable network encryption keys Apr. 15, 2008
7353385 Authentication system, authentication method, authentication apparatus, and authentication method therefor Apr. 1, 2008
7353395 Authenticated ID-based cryptosystem with no key escrow Apr. 1, 2008
7350086 Creation of image file Mar. 25, 2008
7334134 System and method for playback of copying-and-use-protected acoustic and image media Feb. 19, 2008
7327846 Secure cryptographic key exchange and verifiable digital signature Feb. 5, 2008

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