Position verification technique for secure geographical routing in MANET

MANET is a dynamic network which is used extensively today due to its diverse applications in several fields like military battlefield, disaster relief operations, etc. Since MANET has a mobile topology, the position of every node keeps changing from time to time. Hence, during data transmission, several nodes enter and leave the network. As a result, MANETs are vulnerable to several attacks in which the attackers get access to the network through malicious nodes entering the network in disguise of valid nodes. So, in MANETs, it is necessary to verify the nodes before using them to forward data packets/messages. In this paper, position verification technique for secure geographical routing has been proposed in MANET. In this technique, we estimate the position of the nodes before using them as forwarding nodes. Once the location is estimated, then it is verified for authenticity and then used for transmitting data packets.