The purpose of this paper is to overcome the problems of high communication failure probability, high energy cost, low global connectivity and poor network robustness, a dynamic key distribution method based on exponential algorithm is proposed. In this method, the collusion characteristics of newly added nodes and revoked nodes in wireless sensor networks are used to establish a wireless sensor security model. The exponential algorithm is used to initialise, broadcast, self repair session key and mutual session key It can help repair, add nodes and cancel nodes to realise dynamic key distribution. The experimental results show that when the number of dynamic key nodes is 600, the probability of communication failure is 47%; when the number of hops is 10, the energy cost is only 1.64 mJ, and the network robustness is high. It reduces the pressure of wireless sensor network and plays a positive role in the root cause location of massive alarm information fault.
展开▼
