Abstract: The IOT which is to achieve the connection between human and things through the complete perception, reliable transmission and intelligent processing is the third wave of technology revolution in information industry after the application and popularization of computer and Internet. In China, IOT is taken into account as the twelfth five-year plan. Undoubtedly, with the Maturity of technology and system, it will completely change our lives. As one of the most iconic technology in the Internet of things era, the wireless sensor networks (WSNs) will be the focus and focal point of the present and future application and research. However, the focuses of WSNs are the routing algorithm, key distribution and architecture in previous studies. And the trust of node has been always overlooked. In some existing trust management models, they didn't quite take the time effect issue among nodes into consideration, and there were irrationality in weights and the way of computing reputation value. According to WSNs’ characteristics, a reasonable and feasible model which is based on repeated games is created in this paper .Besides, we establish a punishment and reward mechanism to solve the time issue of node’ reputation. Finally, we confirmed the trust manage model could evaluation node’ reputation effectively in WSNs. Through inhibition selfish node and malicious node, the reliability of WSNs has got a great progress.

Key words: repeated games, WSNs, trust model, trust evaluation