Description

Mobile ad-hoc network (MANET) is wireless decentralized network, where network nodes move dynamically. The fact that mobile ad-hoc networks (MANET) lack fixed infrastructure and use wireless link for communication makes them very susceptible to malicious attacks.Ad-hoc On-demand Distance Vector (AODV) is one of the most widely used routing due to its dynamic nature that is routing information is exchanged and path finding process is initiated only when path is required by a node to communicate with a destination node.One of the main problem with AODV is that it is vulnerable to black hole attack which decreases the throughput of the network. In a black hole attack, malicious nodes attract data packets and drop them instead of forwarding. During blackhole attack, a malicious node captures packets and not forwards them in the network and advertises itself as having the shortest path to the node whose packets it wants to intercept. In this paper we propose a secure and modified version of the AODV protocol which will encounter the black hole attacks and as it will detect the blackhole node and then prevents against it.