A MODIFIED AODV PROTOCOL TO MITIGATE COMBINED IMPACT OF MULTIPLE ATTACKS IN MANET

Since past two decades MANET researchers have focused on providing security solution to MANET to protect them from various network attacks. Most of the recent security approaches are restricted to address specific attacks only. This makes them obsolete when a different attack is introduced in the network. The objective of this research work is to offer a comprehensive solution to protect MANET from different security threats. We have proposed Multiple Attacks Protected Ad-hoc On-demand Distance Vector (MAPAODV) Routing Protocol. It provides a consolidated approach to address different security threats in the network with the lowest computational overhead. The Node Behavior Score (NBS) module of the proposed protocol performs precise detection of the attack whereas Node Reliability Analysis (NRA) module achieves attack mitigation and reliable route formation. The efficiency of the proposed protocol is tested in the simultaneous presence of grayhole and wormhole nodes using NS2 simulation and compared against two existing protocols. The simulation results show better performance of the proposed protocol against different attack types.