关键词: 无线传感器网络, LEACH协议, 安全路由, 低能耗, NS2

Abstract: Low-Energy Adaptive Clustering Hierarchy (LEACH) protocol is a critical clustering hierarchy routing protocol for wireless sensor network. Lack of security measures makes it vulnerable to personation and laptop attacks, especially during the cluster set-up phase. A new low-energy secure routing protocol based on SPINS was proposed. It authenticated broadcast packets using μTESLA, distributed authenticated key to cluster-head and cluster-members using SNEP. In the proposed protocol, sensor nodes needed to verify whether the cluster-head was the node it claimed to be. They also needed to verify whether they could reach the cluster-head. If both checks were passed, then sensor nodes joined in the cluster. Security analysis shows that the proposed protocol realized confidentiality, integrity, freshness, identity authentication, two-way authentication and some other security objectives. Simulation results based on NS2 show that energy consumption of sensor nodes does not significantly increase, due to the sink node and cluster-heads undertaking most of safety related tasks.

Key words: Wireless Sensor Network (WSN), Low-Energy Adaptive Clustering Hierarchy (LEACH) protocol, secure routing, low energy, Network Simulator version 2 (NS2)