关键词: 无线传感器网络, 信任模型, 正反馈, 簇头, 妥协性

Abstract: Considering a single node in the wireless sensor networks can be compromised to malicious attacks and energy consumption for each node in the cluster can not be balanced，this paper proposes a trust model which is based on positive feedback.The model is based on positive feedback，because the cluster head gives the other node in the cluster a trust evaluation when it is at the end of cluster head.The trust evaluation result called trust list is sent to the candidate cluster immediately.For the trust list includes the history behavior of sending correct data and residual energy attribute，the trust evaluation result based on positive feedback is rotated reliably and cumulated incrementally.Simulation results and analysis show that：This trust model can eliminate the false data which are sent by malicious nodes effectively and identify failure nodes accurately，thereby optimizes the performance，provides a credible supporting environment for topology algorithm，data collection algorithm or compression algorithm etc.

Key words: wireless sensor networks, trust model, positive feedback, cluster head, compromise