Secure routing method based on trust mechanism

The wireless sensor network has the characteristics of small size, low cost, high flexibility and the like, so that the wireless sensor network is widely applied to unattended places with severe environments. The trust model is established in the routing method, so that the cluster head or routing selection accuracy can be effectively improved. According to the invention, the self-adaptive weight and the historical local trust are considered, so that the assessment of indirect trust is more accurate and reliable, and the invention provides the SRPTM (Secure Routing Protocol for Wireless Sensor Network) based on the trust mechanism, so that the invention provides the SRPTM (Secure Routing Protocol for Wireless Sensor Network) based on the trust mechanism. According to the provided SRPTM, an optimal relay angle is obtained according to the distance from a cluster head to a base station, so that the search range for searching a routing path is narrowed, and then an optimal path is selected for nodes in the range