Cryptology ePrint Archive: Report 2004/363

Rethinking the security of some authenticated group key agreement schemes

Qiang Tang and Chris J. Mitchell

Abstract: In this paper we analyse three improved authenticated group key agreement schemes, all of which are based on the conference key distribution systems proposed by Burmester and Desmedt. We show that all the schemes suffer from a type of impersonation attack, although these schemes are claimed to be secure.

Category / Keywords: cryptographic protocols / authenticated group key, bilinear map, impersonation attack

Publication Info: this paper has not been accepted or published

Date: received 16 Dec 2004

Contact author: qiang tang at rhul ac uk

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Version: 20041220:174549 (All versions of this report)

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