A NOVEL APPROACH FOR A SECURED INTRUSION DETECTION SYSTEM IN MANET

Abstract

Mobile Adhoc Network (MANET) is a collection of wireless mobile computers (nodes) in which each node communicate with the other nodes in the network through radio waves. Here each node in the network is independent and thus it does not rely on each other for moving across the network. The most important attractions of MANETs is that they can be deployed with less effort as these network have no fixed infrastructure and are decentralized in their functioning. Each node in the network are capable of acting as both a sender and also as a receiver. The characteristics of MANETs such as: Scalability, dynamic topology, node mobility, and self-organizing capability of MANET made it widely accepted among applications like military environment, disaster relief or emergency recovery. The set of applications for MANETs can range from small-scale, static networks to largescale, highly mobile networks. But the easily accessible peer to peer network and the large scope distribution of mobile nodes made it vulnerable to both external and internal attacks. In this paper, an efficient intrusion detection system (IDS) was being proposed and implemented which promotes complete unlinkability and is also capable to conceal the contents of all types of packets transmitted across the network. Thus it adds a private preserving feature to the IDS which enables the packet to be transmitted in the network with all the privacy and security required. The proposed scheme uses a novel combination of group ID and digital signature-based encryption for route discovery. This scheme enables the malicious node to be detected during the route discovery phase and avoids these nodes during the data transmission. Thus the proposed scheme promotes a secure transmission through the network. Compared to existing approaches the proposed scheme demonstrates a very low end to end delay and also significantly improves the packet delivery ratio.