Provably authenticated group Diffie-Hellman key exchange - The dynamic case (Extended abstract)

Conference · Thu Sep 20 04:00:00 EDT 2001

OSTI ID:788047

Bresson, Emmanuel ^[1]; Chevassut, Olivier; Pointcheval, David

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1. LBNL Library

Dynamic group Diffie-Hellman protocols for Authenticated Key Exchange(AKE) are designed to work in scenario in which the group membership is not known in advance but where parties may join and may also leave the multicast group at any given time. While several schemes have been proposed to deal with this scenario no formal treatment for this cryptographic problem has ever been suggested. In this paper, we define a security model for this problem and use it to precisely define Authenticated Key Exchange (AKE) with ''implicit'' authentication as the fundamental goal, and the entity-authentication goal as well. We then define in this model the execution of a protocol modified from a dynamic group Diffie-Hellman scheme offered in the literature and prove its security.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director, Office of Science. Office of Advanced Scientific Computing Research. Mathematical, Information, and Computational Sciences Division (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 788047
• Report Number(s): LBNL--48202
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
COMPUTER CODES
DYNAMIC GROUP KEY EXCHANGE DIFFIE-HELLMAN SECURITY MODEL.
SECRECY PROTECTION
SECURITY