Mobile Ad Hoc Based On Clustering And Finite Timed Automaton Intrusion Detection Model Research

A mobile Ad Hoc networks (MANET) is a decentralized, multi-hop, self-configuring, peer-to-peer communication network that consists of several nodes with radio transceiver and doesn’t depend on fixed network infrastructure. Owing to its flexible connection and convenient application, MANET is attracking more and more attention from international military, academe and industrial community. MANET has been applied widly and the research on it has already become an important field in mobile communication technology. For having features such as open media, dynamic topology, distributed collaboration, capacity-constrained, MANET is more frangible and vulnerable compared to traditional network, also the design of security scheme is more difficult.The thesis presents the characteristics of MANET and its security issues, focuses on researches of security and intrusion detection of MANET. Firstly, through analysing the security threats of MANET, summarising the existing intrusion detection schemes are discussed, then proposing the ideology of this research. Secondly, considering the limitation of safety of clustering method at MANET, then proposing a clustering algorithm based on reputation and resource in MANET, adding resource as a important parameter in the new method, improving the cluster-heads electronal methods as well,ensuring structural security of the clusters, improving the stability of the cluster structure at the same time, better balanced clustering algorithm of validity and availability. Thirdly, proposing a new intrusion detection algorithm based on timed automaton for AODV protocol, and on this basis, designing a kind of detection model named CT_IDS for MANET. The algorithm adopts the rule-based detection mechanism, can detect the network intrusion events in limited time, with better detection efficiency and higher timeliness. CT_IDS detection model with complete managing, detecting, and responsing mechanism.Finally, through simulation and analysis by NS2 network simulator, the algorithm analysis and experimental results show that it could obtain good detection performance, enhanced the security of MANET , and it has certain theoretical significance and the practical value.