CLDASR: Cross Layer Based Detection and Authentication in Secure Routing in MANET

In MANETs, providing the security to the network from the routing attacks like black hole and gray hole is a big challenge. To resolve the above issues, in this paper we implement a cross layer based detection and authentication technique for secure multipath routing (CLDASR). In the authentication method, when a source wants to send a data packet or a RREQ packet, it generates a hash value also encrypts the hash with the path using the shared symmetric key with the destination. In the black hole or gray hole detection method, every node observes the next hop in current route path. The proposed method helps in detecting the malicious node caused due to the packet drop and link failure in the network. By simulation results we show that the proposed approach reduces the packet drop due to the attack and increases the packet delivery ratio in malicious environment.