Cryptology ePrint Archive: Report 2005/221

Constant Round Dynamic Group Key Agreement

Ratna Dutta and Rana Barua

Abstract: We present a fully symmetric constant round authenticated group key agreement protocol in dynamic scenario. Our proposed scheme achieves forward secrecy and is provably secure under DDH assumption in the security model of Bresson {\em et al.} providing, we feel, better security guarantee than previously published results. The protocol is efficient in terms of both communication and computation power.

Category / Keywords: public-key cryptography / group key agreement, DDH problem, provable security

Date: received 8 Jul 2005

Contact author: ratna_r at isical ac in

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Version: 20050709:050758 (All versions of this report)

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