A modified AODV protocol for preventing blackhole attack in MANETs

Wireless Mobile Ad-Hoc Networks (MANETs) are infrastructure-less networks commonly used for dynamic connection between nodes. These networks work without any external router for maintaining the connection and the nodes themselves behave like a router. Ad-Hoc On Demand Distance Vector (AODV) routing is a widely used protocol for managing communications between the mobile nodes. A blackhole attack is one in which the nodes create a false route through them and then perform malicious activities on the transmitted packets. This paper presents a modification of the existing AODV routing protocol to prevent blackhole attacks in MANETs in an erratic terrain with a high probability of packet loss. A mathematical proof is given to confirm the effectiveness of the proposed algorithm with respect to the previous solution in the literature.