Abstract
Mobile ad hoc network (MANET) is an autonomous self-configuring 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 paper, 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) with minimum routing overhead and high packet delivery ratio. The proposed technique intends to detect and remove black, gray, and cooperative black hole AODV attacks depending on a mobile backbone network constructed from 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. The backbone network also tries to bait the malicious nodes to reply to a request for a route to fake destination address. The proposed technique uses the control packets of the AODV to exchange its control information which highly reduces the overhead. The simulation results show that the performance of the proposed technique is more secure than AODV and the other recently introduced techniques.
Highlights
Mobile ad hoc network (MANET) [1] is a set of mobile nodes communicate wirelessly to establish network without fixed infrastructure
It can be shown that the proposed technique is more secure than [14, 15], because BBNs perform the security check periodically not based on a request from regular not trusted nodes, BBNs are the only nodes that perform the monitoring, detect and remove the malicious nodes, know the restricted IP address (RIP) and send the route request packet (RREQ) for the RIPs
If all neighbor nodes around the malicious node do not forward their packets, the malicious node cannot communicate with the other nodes in the MANET and the malicious node is isolated from the network [20]
Summary
Mobile ad hoc network (MANET) [1] is a set of mobile nodes communicate wirelessly to establish network without fixed infrastructure. Each node works as a router that forwards packets for other nodes These infrastructure-less mobile nodes dynamically participate in an ad hoc route discovery process and create routes among themselves to form a wireless network on the fly. Due to the wireless communication nature and the collaboration of MANET nodes in finding routing paths, MANET is more vulnerable to security threats than ordinary wired networks [2] Another characteristic of a MANET is its resource constraints, i.e., limited bandwidth and battery power of its nodes [1]. Many security techniques are introduced to prevent different MANET attacks [2] Many of these techniques are directed to protect AODV [4] routing protocol from attacks because it is a popular reactive routing protocol designed for mobile ad hoc network.
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