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http://dx.doi.org/10.3745/KIPSTC.2002.9C.4.597

A Key Distribution Protocol for Secure Multicasting in Large Dynamic Groups  

Kim, Tae-Yeon (Dept.of Computer Information Communication, Senam University)
Kim, Young-Kyoon (Electronics and Telecommunications Research Institute)
Abstract
Changing group key is necessary for the remaining members when a new member joins or a member leaves the group in multicast communications. It is required to guarantee perfect forward and backward confidentiality. Unfortunately, in large groups with frequent membership changes, key changes become the primary bottleneck for scalable group. In this paper, we propose a novel approach for providing efficient group key distribution in large and dynamic groups. Unlike existing secure multicast protocols, our protocol is scalable to large groups because both the frequency and computational overhead of re-keying is determined by the size of a subgroup instead of the size of the whole group, and offers mechanism to prevent the subgroup managers with group access control from having any access to the multicast data that are transfered by sender. It also provides security service for preserving privacy in wireless computing environments.
Keywords
Session Key; Multicast; Key Distribution; Security; Subgroup;
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