Research On Key Management Scheme For Wireless Sensor Network

Recently, wireless sensor network,has been rapidly developed. Wireless sensor network is comprised of a large number of sensor nodes which are cheap and small, they form a multi-hop self-organization network in wireless communication. The purpose of the wireless sensor network is to sense,get and then process information.form the network coverage area. However, the open environment and the fragility of the nodes make it suffer serious security problems.This paper does mainly reseach on key management in wireless sensor network. The resource constraints make the key management schemes in traditional wired network don’t appropriate for wireless network. This paper first looks back the development,applications and security problems of wireless sensor network, based on this,it mainly introduce the characteristics of key management in WSN,the classification of key managent schemes in WSN and the performance evaluation indexes of key management schemes in WSN.Based on the reseach of Polynomial-Based key management scheme, due to the large energy consumption in the procedure of keys establishment, this paper proposes an improved Polynomial-Based key management scheme named RDPB,which presents the mechanism of Debris-of-Polynomial-Share,also combines the mechanism of c-neighbor. The scheme greatly reduces the energy consumption used for generating pairwise keys. Experimental results and analysis show that it has a higher security level;Based on the reseach of Bilinear Paring, this paper also proposes a Bilinear Paring-Based key management scheme,named BPKMS,it uses Bilinear Paring to generate pairwise keys between cluster-to-cluster and cluster-to-sink ,uses key pre-sharing technique to generate pairwise keys between nomal node-to-cluster. Besides,it also combines authentication mechanism to ensure every pairwise key negotiations. The performance analysis shows that BPKMS has the characteristics of low computational consumption, low communication consumption, low memory occupation and high security level.