Research On Secure Routing Technology For Mobile Ad Hoc Networks Based On Trust Model

Mobile Ad Hoc network is built by a variety of different mobile terminal devices,it is in the wireless network is a distributed network.This type of network does not need to pre-set any fixed infrastructure,making it has a non-central,self-organization,network topology dynamic variability and resource constraints and so on.As the mobile Ad Hoc network routing protocol design did not consider the initial security issues,making its security problems frequently,vulnerable to malicious attacks in the network,such as: flood attacks,camouflage tamper attacks,black hole attacks.In order to improve the security of mobile Ad Hoc network routing protocol and solve the existing security problems,the Ad Hoc network routing security protocol based on trust model has been extensively studied.Based on the model of security trust evaluation,this thesis studies the secure routing technology of mobile Ad Hoc network.Firstly,the problem of network availability reduction caused by the disagreement between malicious nodes and selfish nodes is proposed for mobile Ad Hoc network routing protocol based on trust model,and a trust recovery mechanism based on identity authentication mobile Ad Hoc network is proposed.Using identity authentication to identify malicious nodes,and self-confidence to restore the trust in order to achieve the purpose of reducing network congestion and improving network quality.The simulation results show that the implementation of the mechanism can effectively improve the network availability and security.Second,because a secure AODV routing protocol,a malicious node can generate any large target serial number,and hide the true path length to destroy the route.And the route between the source node and the destination node through the authenticated malicious node can pass the routing message without updating the routing information.In this thesis,a security AODV routing protocol based on trust evaluation model is proposed.The scheme introduces the MAC address and device ID as the node authentication mark,and provides the second layer security protection for the node authentication.Through the construction of the trusted route,the communication nodes are trusted nodes in the routing topology.The simulation results show that the implementation of the scheme has certain effect on the security of the network.In conclusion,it is of great theoretical and practical significance to evaluate the security and stability of mobile Ad Hoc networks by studying the trust model and secure AODV routing protocol in mobile Ad Hoc network,and designing the related security routing mechanism and security routing scheme.