BAAP: Blackhole attack avoidance protocol for wireless network

The lack of centralised infrastructure in adhoc network makes it vulnerable to various attacks. MANET routing disrupts if the participating node start performing malicious activity instead of the intended function. One such specific attack is a blackhole attack in which malicious node falsely claiming itself as having the fresh and shortest path to the destination. In this paper, we propose a protocol for avoiding blackhole attack without the contraint of special hardware and dependency on physical medium of wireless network. BAAP forms link disjoint multi-path during path discovery to provide greater path selection in order to avoid malicious nodes in the path using legitimacy table maintained by each node in the network. Non-malicious nodes gradually isolate the blackhole nodes based on the values collected in their legitimacy table and avoid them while making path between source and destination.