关键词: Ad hoc网络, D-S证据理论, 入侵检测, 可信度

Abstract: Without a fixed infrastructure，Ad hoc networks must distribute intrusion detection among their nodes.A distribute intrusion detection system needs to combine data from multiple nodes to carry out the detection，but the observing nodes may not be reliable.D-S theory of evidence considers the concept of uncertainty，and is well suited for this type of problem.Moreover，Dempster’s role for combination fuse together multiple pieces of evidence from some unreliable nodes.The paper starts with reliability and gives the process of initialization and gives the material analysis of the process of fusing together multiple nodes’data using D-S theory of evidence.

Key words: Ad hoc networks, D-S theory of evidence, intrusion detection, reliability