Cryptography – Key management – Having particular key generator
Reexamination Certificate
2007-09-18
2007-09-18
Barron, Gilberto (Department: 2132)
Cryptography
Key management
Having particular key generator
C380S278000, C380S285000, C713S171000
Reexamination Certificate
active
11155899
ABSTRACT:
This invention relates to a method for generating a shared secret value between entities in a data communication system, one or more of the entities having a plurality of members for participation in the communication system, each member having a long term private key and a corresponding long term public key. The method comprises the steps of generating a short term private and a corresponding short term public key for each of the members; exchanging short term public keys of the members within an entity. For each member then computing an intra-entity shared key by mathematically combining the short term public keys of each the members computing an intra-entity public key by mathematically combining its short-term private key, the long term private key and the intra-entity shared key. Next, each entity combines intra-entity public keys to derive a group short-term Sipublic key; each entity transmitting its intra-entity shared key and its group short term public key to the other entities; and each entity computing a common shared key K by combining its group short term public key (Si), with the intra-entity shared key (Xi), and a group short term public (Si) key received from the other entities.
REFERENCES:
patent: 5491750 (1996-02-01), Bellare et al.
patent: 6256733 (2001-07-01), Thakkar et al.
patent: 6530020 (2003-03-01), Aoki
patent: 6584566 (2003-06-01), Hardjono
patent: 6934392 (2005-08-01), Vanstone
patent: 2241705 (1998-09-01), None
patent: 2277633 (1999-07-01), None
patent: 0661844 (1995-07-01), None
patent: 0739106 (2003-10-01), None
patent: WO 00/01109 (2000-01-01), None
patent: WO 01/06697 (2001-01-01), None
Blackburn et al., “Shared Generation of Shared RSA Keys”, 1998, Retrieved from the Internet on May 23, 2006: <URL: http://citeseer.ifi.unizh.ch/blackburn98shared.html>.
Boneh et al., “Efficient Generation of Shared RSA Keys”, 1997, Retrieved from the Internet on May 23, 2006: <URL: http://citeseer.ist.psu.edu/boneh97efficient.html>.
Hardjono et al., “Secure And Scalable Inter-Domain Group Key Management for N-to-N Multicast”, 1998, Retrieved from the Internet on May 23, 2006: <URL: http://ieeexplore.ieee.org/iel4/5962/15952/00741118.pdf?tp=&arnumber=741118&isnumber=15952>.
Alfred J. Menezes et al., Handbook of Applied Cryptography, 1997, CRC Press, pp. 570-577.
Michael Steiner et al., Cliques: A New Approach to Group Key Agreement, May 1998, IEEE.
Colin Boyd and Wenbo Mao, “Design and Analysis of key Exchange Protocols via Secure Channel Identification”, article, Nov. 28, 1994, 11, University of Manchester, Manchester.
Paul C. Van Oorschot and Michael J. Wiener, “Authentication and Authenticated key Exchanges”, article, Mar. 6, 1992, 19, Kluwer Academic Publishers, Netherlands.
Ateniese, G. et al.; “New Multiparty Authentication Services and Key Agreement Protocols”; IEEE Journal on Selected Areas in Communication; Apr. 2000; pp. 628-639; vol. 18, No. 4.
Langford, Susan K.; “Weaknesses in Some Threshold Cryptosystems”; Proceedings of the Annual International Cryptology Conference, Berlin, Germany; Aug. 18, 1996; pp. 74-82; vol. CONF. 16; Springer.
Barron Gilberto
Blake Cassels & Graydon LLP
Certicom Corp.
Dinh Minh
Orange John R. S.
LandOfFree
Split-key key-agreement protocol does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Split-key key-agreement protocol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Split-key key-agreement protocol will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3785901