Cryptology ePrint Archive: Report 2004/251

Attacks on Bresson-Chevassut-Essiari-Pointcheval's Group Key Agreement Scheme for Low-Power Mobile Devices

Junghyun Nam, Seungjoo Kim, and Dongho Won

Abstract: In this paper, we show that Bresson-Chevassut-Essiari-Pointcheval's group key agreement scheme does not meet the main security properties: implicit key authentication, forward secrecy, and known key security. Also, we propose an improved version which fixes the security flaws found in the scheme.

Category / Keywords: cryptographic protocols / Group key agreement, key authentication, forward secrecy, known key security

Date: received 24 Sep 2004, last revised 7 Dec 2004

Contact author: jhnam at dosan skku ac kr

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Version: 20041208:060854 (All versions of this report)

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