Abstract: In order to realize secure and efficient routing in wireless sensor networks, a local trust model was built In this local trust model, the trust value of a node was determined by the ratio of the packets delivery, the distance to the target sink node and the residual energy. And using this local trust model and the multiple criteria decision making technology, the next hop was chosen on the basis of the residual energies, the trust values, the direction factors and the distances to the target sink node of its neighbors. At the same time, the encryption and authentication mechanism based on the symmetric cryptography were used between neighboring nodes so as to ensure the secure packets forwarding. The proposed routing scheme can not only prevent most routing attacks and realize secure routing, but also can balance the life of the network and the efficiency of routing well to achieve efficient routing.

Key words: Wireless sensor networks,Residual energy,Trust value,Next hop,Multiple criteria decision making