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The Scientific World Journal
Volume 2015, Article ID 801632, 10 pages
Research Article

Mobility Based Key Management Technique for Multicast Security in Mobile Ad Hoc Networks

1Department of Computer Science, Er.Perumal Manimekalai College of Engineering, Hosur 635117, India
2Er.Perumal Manimekalai College of Engineering, Hosur 635117, India
3Department of Information Technology, KSR College of Technology, Tiruchengode 637211, India

Received 12 September 2014; Accepted 1 January 2015

Academic Editor: Hai Jiang

Copyright © 2015 B. Madhusudhanan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In MANET multicasting, forward and backward secrecy result in increased packet drop rate owing to mobility. Frequent rekeying causes large message overhead which increases energy consumption and end-to-end delay. Particularly, the prevailing group key management techniques cause frequent mobility and disconnections. So there is a need to design a multicast key management technique to overcome these problems. In this paper, we propose the mobility based key management technique for multicast security in MANET. Initially, the nodes are categorized according to their stability index which is estimated based on the link availability and mobility. A multicast tree is constructed such that for every weak node, there is a strong parent node. A session key-based encryption technique is utilized to transmit a multicast data. The rekeying process is performed periodically by the initiator node. The rekeying interval is fixed depending on the node category so that this technique greatly minimizes the rekeying overhead. By simulation results, we show that our proposed approach reduces the packet drop rate and improves the data confidentiality.