Node behavior trust evaluation based on behavior evidence in WSNs

In trust evaluation of wireless sensor networks, behavior evidence is the fundamental basis of behavior evaluation. But at present, researchers almost directly use node behavior results or use a third party´s evaluation results to synthesize it, not study the original evidence of node behavior and ignore analysis of node behavior history, which limit the reliability, rationality and sharing of trust. Drawing on the characteristics of social trust and trust requirement in wireless sensor networks application, we first put forward basic criteria about evaluating node behavior trust, and then bring forward a kind of evaluation mechanism on node behavior trust based on sliding windows model. Through various operations on sliding window, we ensure evaluation principles of node behavior trust. Finally, we use three theorems to prove strategy´s effect, reliability and scalability. The results lay the quantity foundation for WSNs application and research based on behavior trust.