Black hole attack detection and prevention strategy in DYMO for MANET

Dynamic MANET On-Demand (DYMO) routing protocol has been used to establish an ad-hoc networks. DYMO is advance version of AODV routing protocol develop to improve the network performance. Security is the major challenge in DYMO routing protocol and prone for various security threats. This research work attempts to develop a mitigation algorithm to avoid and prevent genuine nodes from malicious attack. Black hole attack is one of the security threat in which the traffic is redirected to such a node that actually does not exist in the network. The black hole node presents itself in such a way to the other nodes and networks that it knows the shortest path. The complete research work is classified into three categories which are without attack, with attack and preventive scenario. The performance parameter taken for analysis are throughput and packet delivery ratio against the varying parameters like number of nodes, speed, pause time and area to observe the impact of black hole attack and proposed mechanism with different situation. A Qualnet 5.2 simulator has been used to simulate and evaluate the performance of proposed solution. The complete experimental setup concludes that improvement in mobile node increase the network performance but also increase the black hole impact. Subsequently, improvement in node speed degrades the black hole impact.