Research on Security Based on Trust Mode for Wireless Sensor Networks

• 1、College of Communication and Information Engineering,Chongqing University of Posts and Telecommunication,Chongqing 4000645

Abstract：The existing trust model for wireless sensor networks rarely consider attacks against the trust system itself, therefore, a trust evaluation model for defense against trust system attacks (DTSA) is proposed. Firstly, the direct trust is calculated by the fuzzy comprehensive evaluation model, and the control factor is used to reduce the range of the trust value of the On-off attack node. Then filter and weight the recommendation trust to reduce the impact of malicious nodes on indirect trust. When calculating the integrated trust, self-adaptive weight is designed for historical trust, which inhibits the rapid rise of the malicious node\'s trust value. The simulation results show that the average trust value of the On-off attack node is reduced by 16.4% compared with other models. The average errors caused by bad mouth attack and collusion attack decreased from 0.118 and 0.101 to 0.051 and 0.039, respectively. Therefore，DTSA can effectively deal with the attack of trust model and improve the accuracy of trust evaluation.

Keywords： Wireless sensor network trust model fuzzy comprehensive evaluation malicious node node trus