Security and Performance of Group Key Agreement Protocols

S. Zheng, D. Manz, J. Alves-Foss (USA), and Y. Chen (PRC)


Group Key Agreement, Diffie-Hellman, Public Key


Several group key protocols have been pre sented in the literature to enable secrecy of communication among dynamic groups of participants. However, there is a lack of consistency in the literature in terms of operations supported and performance metrics of the various proto cols. This makes it difficult for designers to choose the best protocol for their specific applications. To alleviate this problem we introduce a generic model of group key exchange protocols which we use to prove security proper ties of the protocols. In addition, we introduce new perfor mance metrics to be used to assist in uniformly comparing these protocols and then improve the performance of five protocols based on these operations and metrics.

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