基于低能耗的无线传感器网络安全LEACH协议

摘要

针对无线传感器网络分层型路由协议面临的安全威胁和能量有限的问题,提出一种能量优化的安全LEACH协议(SC-LEACH).该协议通过簇头选举、建立分簇、TDMA时隙分配、信息交互四个阶段的执行,准确设定阈值,解决了最佳簇头数精确选取的问题,同时采用预置共享密钥对方式抵御各种恶意攻击.通过与采用对称密钥加密方式的LEACH协议对比,仿真验证了SC-LEACH算法的有效性,表明该协议在能量优化的同时提高了网络安全性.%Aiming at the security threats faced by hierarchical model routing protocol and the energy limited of wireless sensor network, put forward the secure LEACH routing protocol {SC-LEACH) based on low-power cluster-head selection algorithm. This protocol gets the four stages of implementation in cluster head election,creating cluster,TDMA rime slot allocation and information interaction to accurately set threshold, and solve the accurate selection of optimal cluster number. At the same time use preset shared key on the way to resist all sorts of malicious attacks. Comparing with the LEACH protocol which uses the symmetric keys dispatch,this simulation validates the effectiveness of SC-LEACH and shows that the algorithm optimizes energy as well as improves the security of routing.