Implementation and Performance Evaluation of Black Hole Attacks on DSR and AODV in MANETs

Mobile Ad-hoc Networks (MANETs) are type of wireless multi-hop networks that consists of group of mobile nodes that can interact with each other without the help of any predefined infrastructure or centralized controller such as a base station. MANETs are easily prone to security attacks. Black hole attack is one of such attacks. In a black hole attack, a malicious node deceitfully publicize itself as having the shortest path to a given destination and drops the data packet without forwarding it to the actual destination. Dynamic Source Routing (DSR) and Ad-hoc On-demand Distance Vector (AODV) protocols are two well-known protocols used for routing in the MANETs. In this thesis, we investigate the effect of black hole attack in both DSR-based and AODV-based MANETs. For this purpose, we implement both protocols using Network Simulator version 2 (NS-2) to obtain the performance in terms of Packet Delivery Ratio (PDR), End-to-End Delay (EED) and throughput with black hole attack and without black hole attack. A modified approach is implemented for DSR and AODV protocols to improve their performance in the presence of black hole attacks. Simulation results obtained show that network performance is reduced for both protocols in the presence of balckhole attack and AODV protocol is more affected by the black hole than DSR protocol. The results of the Modified schemes obtained show a significant improvement in the network performance over DSR and AODV protocols with black hole. Keywords: MANET, DSR, AODV, black hole, PDR, EED, throughput.