Cryptology ePrint Archive: Report 2005/357

Cryptanalysis of Two ID-based Authenticated Key Agreement Protocols from Pairings

Kyung-Ah Shim

Abstract: Recently, a number of ID-based two-party authenticated key agreement protocols which make of bilinear pairings have been proposed \cite {CJL,MB,Sh,S,X}. In this paper, we show that the Xie's protocol \cite {X} does not provide implicit key authentication and key-compromise impersonation resilience. Also, we point out the vulnerability of the Choi {\it et al}'s protocol \cite {CJL} against signature forgery attacks.

Category / Keywords: cryptographic protocols / cryptanalysis, key management

Date: received 5 Oct 2005

Contact author: kashim at ewha ac kr

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Version: 20051009:093050 (All versions of this report)

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