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Secure multicast communication in mobile adhoc networks is challenging due to its inherent characteristics of infrastructure-less architecture with lack of central authority, high packet loss rates and limited resources such as bandwidth, time and power. Hence key management is the fundamental challenge in achieving secure communication using multicast key distribution in mobile adhoc networks. This paper proposes a new cluster based multicast tree (CBMT) algorithm for secure multicast key distribution, in which source node uses Multicast Destination Sequenced Distance Vector (MDSDV) routing protocol to collects its hop neighbors to form cluster and each node which have child node is elected as the Local controllers of the created clusters.
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