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DDH-based Group Key Agreement in a Mobile Environment
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Abstract: | A group key agreement protocol is designed to efficiently implement secure multicast channels for a group of parties communicating over an untrusted, open network by allowing them to agree on a common secret key. In the past decade many problems related to group key agreement have been tackled and solved (diminished if not solved), and recently some constant-round protocols have been proven secure in concrete, realistic setting. However, all forward-secure protocols so far are still too expensive for small mobile devices. In this paper we propose a new constant-round protocol well suited for a mobile environment and prove its security under the Decisional Diffie-Hellman assumption. The protocol meets simplicity, efficiency, and all the desired security properties. |
BibTeX
@misc{eprint-2004-12099, title={DDH-based Group Key Agreement in a Mobile Environment}, booktitle={IACR Eprint archive}, keywords={cryptographic protocols / group key agreement, multicast, security model, DDH}, url={http://eprint.iacr.org/2004/127}, note={ jhnam@dosan.skku.ac.kr 12760 received 29 May 2004, last revised 7 Dec 2004}, author={Junghyun Nam and Jinwoo Lee and Seungjoo Kim and Dongho Won}, year=2004 }