无线传感器认证.pdf

19 24 © Vol. 19 No. 24 2007 12 Journal of System Simulation Dec., 2007 Merkle 1 1 1,2 1., 710072 2., 710106 Merkle DoS MerkleµTESLA TP393 A 1004-731X (2007) 24-5700-05 Strategy for Broadcast Authentication in Wireless Sensor Networks Based on Hierarchical Merkle Tree 1 1 1,2 JIANG Yi , SHI Hao-shan , ZHAO Hong-gang (1. School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China; 2. Teaching and Research Section of Military Information, Xian Communication College, Xian 710106, China) Abstract: As broadcast is a basic data-transmission approach in wireless sensor networks, broadcast authentication possesses a very important position in the security mechanism of networks. Based on the Merkle tree broadcast authentication strategy, a strategy for hierarchical Merkle tree broadcast authentication was proposed, of which the distribution of initial parameters was discussed. The proposed strategy supports large-scale broadcast senders and reduces computation costs, memory consumption and communication overhead effectively. The simulation indicates that the new strategy can achieve better performance than the existing approaches in dealing with DoS attacks, the authentication rate and the failure recovery delay. Key words: wireless sensor networks Merkle tree strategy for broadcast authenticationµTESLA protocol 1