Abstract: Concerning the defects in key pre-distribution schemes such as storage heavyload, bad extendibility, a energy-efficient dynamic pairwise key establishment algorithm (EE-DPKEA) was proposed. The algorithm adopted the clustered-based scheme to establish pairwise keys, utilized the energy of each node in equilibrium and prolonged the life of sensor networks. Simulation results show that EE-DPKEA is better than the traditional key pre-distribution scheme in many aspects such as security, storage and communication overhead, key connectivity and energy load balancing.

Key words: sensor network, pairwise key, cluster heads, exposure rate of network key

摘要： 针对密钥预分配方案中节点存储负载大、网络扩展性差等问题,提出了能量有效的动态对偶密钥建立算法(EE-DPKEA)。该算法采用分簇方案来建立对偶密钥,均衡利用了网络中所有节点的能量,延长了网络生命周期。实验结果表明,EE-DPKEA算法的安全性、存储通信开销、连通性和能量负载平衡等方面要优于传统的基于密钥预分配的方案。

关键词: 传感器网络, 对偶密钥, 簇头, 网络密钥暴露率