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One of the major problem areas of secure multicast is group key management [2]. In this paper, we present a novel approach for scalable group key management for secure multicast. Unlike previous work, based on centralized structure, our group key management uses distributed group security manager (GSM). Different GSMs are used to manage each local group, reducing the problem of concentrating the overhead on a single group manager. Using individual batch rekeying, it has advantage of reducing the frequency of rekeying from the size and membership dynamics of the group. Also, GSM supports fault tolerance as well.

A Group Key Management Supporting Individual Batch Rekeying and Fault Tolerance for Secure Multicast