The Analysis And Research Of AD HOC Network Trust Model

Ad Hoc network is a kind of self-organized network with point-to point style and special purpose. It use the technology of wireless communication and relay on the neighborhood node to implement communication. It's a multi-hop, temporary and autonomic system comprised of a set of mobile terminal with wireless transceivers. Ad Hoc network has the following characteristics: the network self-organizing ability, the dynamic topology, multi-hopping, the possibility of one-way transmission tunnel exists, weak security and temporariness features, etc.At present, Ad Hoc network mainly apply in military and some emergency occasion need to organize network quickly. It is applying in commerce environment in recent years.The dissertation discusses the security threats that Ad Hoc networks faced and the concept and characteristics of trust. Besides, the Trust Transfer have been studied and analyzed in detail. The dissertation gives an introduction and thorough research of Existing trust models for Ad Hoc networks. Through comparison we find that there are many problems that can not be solved through traditional security policies. Therefore, we deeply research Self-Organized Public-Key Management. The dissertation gives a trust transfer's measure method based on D-S (Dempster-Shafer) in Trust Transfer and Improvement of trust model. Then we design a new algorithm of the optimal certificate chain for trust relationship between two nodes in Ad Hoc network. The algorithm is good complexity and reliability.