Efficient key agreements in dynamic multicast height balanced tree for secure multicast communications in ad hoc networks

Authors:
Hua-Yi Lin;Tzu-Chiang Chiang
Affiliations:
Department of Information Management, China University of Technology, Hsing-Chu, Taiwan;Department of Information Management, Tunghai University, Taichung, Taiwan
Venue:
EURASIP Journal on Wireless Communications and Networking - Special issue on security and resilience for smart devices and applications
Year:
2011

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Abstract

Alterations and unpredictability of the network topology in mobile ad hoc networks (MANETs) are less capable of ensuring the security of multicast data transmissions than in conventional networks. Despite the recent development of many key agreement protocols for MANETs, to our knowledge, only a few secure multicast data transmissions have been integrated into the key agreement. This study proposes a dynamic multicast height balanced group key agreement (DMHBGKA) that allows a user in a multicast group to efficiently and dynamically compose the group key and securely deliver multicast data from a multicast source to the other multicast group users in wireless ad hoc networks. The hierarchical structure of the proposed key agreement partitions the group members into location-based clusters capable of reducing the cost of communication and key management when member joins or leave networks. Moreover, based on elliptic curve Diffie-Hellman (ECDH) cryptography key management, the proposed scheme not only provides effective and efficient dynamic group key reconstructions and secures multicast data transmissions but also fits the robustness of the wireless networks and lowers overhead costs of security management.