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Browse by Category: Main > Information Technology
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:
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Patent Number Title Of Patent Date Issued
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
7522727 Method and apparatus for providing authentication in a communication system Apr. 21, 2009
7522731 Wireless service points having unique identifiers for secure communication 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
7366911 Methods and apparatus for computationally-efficient generation of secure digital signatures Apr. 29, 2008
7366897 Method and system for communication via a computer network 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
7318235 Attestation using both fixed token and portable token Jan. 8, 2008
7308097 Digital signature and authentication method and apparatus Dec. 11, 2007
7289632 System and method for distributed security Oct. 30, 2007
7272226 Split-key key-agreement protocol Sep. 18, 2007
7272231 Encrypting data for access by multiple users Sep. 18, 2007
7251325 Public key cryptosystem using finite non abelian groups Jul. 31, 2007
7243232 Key agreement and transport protocol Jul. 10, 2007
7240199 System and method for verifying delivery and integrity of electronic messages Jul. 3, 2007
7234059 Anonymous authenticated communications Jun. 19, 2007
7224805 Consumption of content May. 29, 2007

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