الفهرس | Only 14 pages are availabe for public view |
Abstract Mobile Ad hoc Network (MANET) is an autonomous selfconfiguring infrastructure-less wireless network. MANET is vulnerable to a lot of routing security threats due to unreliability of its nodes that are highly involved in the routing process. In this thesis, a new technique is proposed to enhance the security of one of the most popular MANET routing protocols that is called Ad hoc on Demand Distance Vector (AODV). The proposed technique intends to detect and remove blackhole, grayhole, cooperative blackhole, wormhole, selective forwarding, and selfish node attacks in AODV based on mobile backbone network. The backbone network is constructed of randomly moving regular MANET nodes based on their trust value, location, and power. The backbone network monitors regular nodes as well as each other to periodically estimate monitoring trust values which represent the reliability of each node in the network. The DROP in the monitoring trust value of any node is used as a clue to its malicious behavior. Also, the backbone network tries to bait the malicious nodes to reply to a request for a route to fake destination address. When a malicious node is detected, the high level backbone network nodes use the control packets of AODV to broadcast malicious node address in order to isolate it. The proposed technique uses the control packets of the AODV technique to exchange its control information which highly reduces the overhead. The simulation results show that the performance of the proposed technique is better than AODV and the other techniques that are iv introduced recently to solve the security issues in AODV. The total |