Document Type : Primary Research paper
Assistant Professor, Department of Computer Applications, Bishop Heber College, Tiruchirappalli – 620 017.
Assistant Professor, Department of Information and Communication Technology, SASTRA Deemed University, Thanjavur – 613 401.
Associate Professor&Head, Department of Computer Applications, Bishop Heber College, Tiruchirappalli – 620 017.
A Mobile Ad hoc Network (MANET) also known as wireless ad hoc network is an increasingly self-building, framework less network of mobile devices combined wirelessly. MANET is a decentralized environment. In such decentralized environment, network nodes perform packet forwarding and other routing services without any central administration. Some security threats like sinkhole attack, black hole attack etc., may occur in the decentralized environment. To address this problem, we propose a novel security approach to detect the malicious node and retransmit the packets into new secure route. In the existing system, Bernoulli Bayesian model is adapted for node’s behavior classification and Markov Chain model is used for behavior evolution tracking. The proposed system adapts node behavior classification using behavior vectors for detecting the malicious nodes and re-route the packet. The proposed system adapts Dijkstra’s shortest path algorithm for sending the packet to the nodes and identifies the malicious nodes earlier that increases the security of the MANET.