ABSTRACT

Abstract

Mobile Ad-hoc Networks (MANET) consist of mobile nodes capable of performing self-configuration, communicate wirelessly with no centralized control and require routing protocols for its operation. However, the existing routing protocols used in MANETs are not secured and faced many security challenges which degrade the performance of the network. Therefore, there is need to build security feature in the existing routing protocol to enhance its performance in the face of emerging threats. In this paper, a proposed model was formulated to provide secure routing in MANET. The model used Public key cryptography also known as RSA with MD5 for authentication and observation-based cooperation enforcement and graph theory-based trust and reputation techniques, built on AODV routing protocol to enhance its security. The simulation of the model was carried out in NS2.35. Performance evaluation of the proposed model AODVRM was carried out by comparing its performance with an existing protocol, AODV using metrics like throughput, End-to-End delay and Packet delivery ratio. Simulation result showed that the proposed AODVRM recorded throughput of 291,502,502,461,506 kilo bytes per seconds (kbps), packet delivery ratio of 94%, 95%, 95%, 86%, 83% and an end-to-end delay of 132, 235, 272, 272, 258 seconds. While AODV recorded throughput of 280, 319, 227, 223, 74 kilo bytes per seconds (kbps). packet delivery ratio of 94%, 93%, 90%, 82%, 65% and an end-to-end delay of 186, 369, 341, 292, 278 seconds. In conclusion, the proposed model AODVRM is more efficient and performs better in the presence of attacks than the conventional AODV in terms of performance metrics used.