Research and Improve on Secure Routing Protocols in Wireless Sensor Networks

Most routing protocols in wireless sensor networks take networks lifetime as design target, but not security. This paper researches on routing security and proposes SS-LEACH algorithm based on LEACH algorithm. The SS-LEACH algorithm makes use of nodes self-localization technology and keys pre-distribution strategy. It improves the method electing cluster-heads and forms dynamic stochastic multi-paths cluster-heads chains. The results of simulation demonstrate that the SS-LEACH algorithm not only prolongs the lifetime of wireless sensor networks effectively, but also enhances routing security strongly.

I. Introduction

In wireless sensor networks, the research on routing protocols is very important. But now most of routing protocols take network lifetime and energy consumption into account, none of which has been designed with security as a goal [1]. So we should pay more attention to routing security in the future. However, the resources of nodes are so limited that traditional safe routing algorithms can't be applied to WSNs directly. And routing security and networks lifetime are seemed to be incompatible. Because clustering algorithms of routing protocols can save energy, prolong the lifetime of the network and are more suitable for the large-scale deployment of the network. Therefore, the clustering algorithms are the research hotspots.