Detecting and Overcoming Blackhole Attack in Mobile Adhoc Network

A mobile Adhoc Network (MANET) is a huddle of autonomous mobile nodes which dynamically forms a temporary multi-hoped radio network, without any use of previous infrastructure. Due to its characteristics like limited resources, changing topology and lack of centralized administration, MANET is exposed to various network layer attacks. Ad-hoc On Demand Distance Vector (AODV) is a self starting routing protocol for MANETs whose security is compromised with the particular type of attack called "BlackHole" attack. In this malicious node advertise itself as having the best path to destination during the route discovery process and thus interrupt the real communication and degrade network performance. In the proposed scheme we deploy the base node in the network that increases the probability of detecting multiple malicious nodes in network and further isolate them from taking part in any communication.