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With the emergence of diverse group-based services, multiple multicast groups are likely to co-exist in a single network,and users may subscribe to multiple groups simultaneously. However, the existing group key management (GKM) schemes, aiming to secure communication within a single group, are not suitable in multiple multicast group environments because of inefficient use of keys, and much larger rekeying overheads. In this paper, we propose a new group key management scheme for multipledoi:10.9790/0661-1213640 fatcat:o7twgcz7nffrphmvglasbuljsi