关键词: Ad Hoc网络, 信任预测, 模糊逻辑, 隶属函数, 恶意节点

Abstract: In order to enhance the security of Ad hoc networks, a dynamic trust prediction model is presented in this paper, This model takes the account of two factors that affect trust: the node’s historical behaviors and capacity of providing services, A time decay function is introuduced to estimate the node’sdirect trust value accurately, and the node’s current trust value is assessed by using fuzzy logic rules prediction methods.Finally，we applied this model into AODV routing protocol so as to verify the validity of the model，which is defined as FTAODV routing protocol，and compared two protocol by using NS-2 simulator. Simulation results show that FTAODV routing protocol can effectively detect malicious nodes, thereby improves packet delivery ratio, decreases average end-to-end delay and routing packet overhead.

Key words: Ad Hoc网络, 信任预测, 模糊逻辑, 隶属函数, 恶意节点