PATH-HOP BASED SECURE AODV TO DETECT BLACK HOLE AND GRAY-HOLE ATTACKS IN MANET
S. Vasantha, Avula Damodaram, S. Rama Krishna · Journal of Critical Reviews · 2020
In this modern communication world, a network can be built on the fly using mobile nodes having networking capability. Such network without any pre-existing support for communication is referred as Mobile Ad Hoc Network (i.e. MANET). It can be deployed in essential areas such as military and civilian environments, disaster management circumstances etc., because of its ad hoc nature. But it lacks central supervision system monitoring legitimacy of the nodes joining and leaving the network. So, any adversary can join spontaneously launching an attack and then silently disappear from the network. Black hole and Gray-hole are the most possible common attacks, in which a node instead of relaying packets consumes them creating a hole in the network. Network performance is severely degraded due to these attacks. In this paper we propose a Path-Hop based Secure AODV protocol, which utilizes multiple paths for relaying data. It detects and discards malicious path(s) involving Black-hole or Gray-hole node during data forwarding phase. It also ensures reliable data transmission between the communicating nodes. Simulation results show that improved performance over other contemporary methods in terms of PDR with minimum NRL while addressing all kinds of Black-hole and Gray-hole attacks.