Abstract: At present there are problems in reputation management mechanism for wireless sensor networks (WSNs),such as high cost of calculation,update and maintenance of reputation,poor resistance to “bad mouthing” and “ballot stuffing”．Taking the clustered wireless sensor network as the background,sensor nodes were divided into cluster head nodes and ordinary sensor nodes．According to the behaviors of sensor nodes on event perception,packet forwarding and data aggregation,a multidimensional node reputation management scheme was put forward.Applying the scheme to reactive multi-path routing protocol AOMDV,this paper proposed a reliable routing protocol called STA based on trusted nodes．The simulation results show that in distrusted environment,the proposed protocol improves the data forwarding rate and delivery success rate in WSNs.

Key words: Wireless sensor network,Reputation,Trust,Sensing,Delivery,Aggregation