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| An EBS-Based Dynamic Key Management Scheme for Wireless Sensor Networks |
| Kong Fan-rui①; Li Chun-wen①③; Ding Qing-qing②; Cui Guang-zhao③; Cui Bing-yi④ |
| ①Department of Automation, Tsinghua University, Beijing 100084, China;②State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; ③Key Laboratory of Informationed Electric Apparatus in Henan State, Zhengzhou University of Light Industry, Zhengzhou 450002, China;④Department of Physics, Nanjing University, Nanjing 210093, China |
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Abstract Security of wireless sensor networks has attracted much attention in recent years and key management is a critical issue of it. EBS-based dynamic key management scheme is a new approach for wireless sensor networks. The major advantages of EBS-based dynamic key management scheme are enhanced network survivability, high dynamic performance and better support for network expansion. But it suffers from the collusion problem, which means it is prone to the coordinated attack of the compromised nodes. In this paper, a special kind of polynomial, the common trivariate polynomial, is presented, which can guarantee that all the nodes having the same polynomial can get the same key. The common trivariate polynomial keys are used in stead of the normal keys in EBS system and a new dynamic key management scheme is designed for clustered wireless sensor networks. Analytical and simulation results show that compared with the former works, the proposed scheme can greatly improve the network resilience to the attack of the compromised nodes and decrease the energy consumption in the process of updating the administration and session keys.
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Received: 17 April 2008
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2009, Vol. 31 
