The increasing popularity of secure group communications has been witnessed in collaborative environments for a long time. Contributory group key schemes are deployed to secure dynamic peer group communications. A number of group applications in resource-limited networks require that the group key scheme should be performance-efficient and failuretolerant. We present a Diffie-Hellman-based contributory group key management scheme which mostly utilizes hash functions. Performance analyses and experimental results show that our approach achieves a new performance minimum, while guaranteeing the same level of security as other approaches.
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