A Random Key Management Scheme Based on Hash Chain in Wireless Sensor Networks

Key Management Scheme is an important factor to improve the safety performance of Wireless Sensor Networks (WSNs). The existing schemes can’t simultaneously meet the high demand of connectivity and anti-destruction to WSNs. We propose a key management scheme base on random Hash chain. The scheme firstly does multidimensional treatment for the key pool, and then uses a Hash Function to hash the key pool into several of key chains, which raises the relation among the keys. The high-relation makes any twice selection of key-set to contain one same key at least, which highly raise the connectivity of WSNs. Our scheme also deploys a small number of auxiliary nodes chain in WSNs. The chain will help WSNs to authenticate node identity and distribute keys among the isolated nodes. Simulation experiments demonstrate that the scheme not only raises the connectivity of WSNs, but also highly enhances the anti-destruction of WSNs.