A hierarchical trust model for cluster-based wireless sensor network

Trust management plays a significant role for guaranteeing the reliability and security of wireless sensor networks. A hierarchical trust model for cluster-based wireless sensor network is proposed. According to the differences between cluster heads and general nodes, the distributed and centralized trust management mechanisms are combined in this paper. In the proposed model, the computation of node trust is based on communication, data and energy aspects . The defined trust value can denote the trust level of WSN nodes objectively and respond to a variety of security threats which wireless sensor network might encounter. Simulation results show that the model has good dynamic adaptability, fault tolerance and accurate discovery ability of malicious nodes, so as to improve the security of WSN effectively.