An Intrusion Detection System in Mobile AdHoc Networks

Networks are protected using many firewalls and encryption software’s.  But many of them are not sufficient and effective. Therefore an intrusion detection system (IDS) is required that monitors the network, detects misbehavior or anomalies and notifies other nodes in the network to avoid or punish the misbehaving nodes. Numerous schemes have been proposed for Intrusion Detection and Response Systems, for ad hoc networks. The ultimate goal of the security solutions for wireless  networks is to provide security services, such as authentication, confidentiality, integrity, anonymity, and availability, to mobile users.  In this paper, we examine the vulnerabilities of wireless networks and argue that we must include intrusion detection in the security architecture for mobile computing environment. We propose a mIDS (Mobile Intrusion Detection System) suitable  for multi-hop ad-hoc wireless networks, which detects nodes misbehavior, anomalies in packet forwarding, such as intermediate nodes dropping or delaying packets. mIDS does rely on overhearing packet transmissions of neighboring nodes. Simple rules are designed to identify the misbehavior nodes. The proess of identyfing the  misbehavior node is  carried out by a  special  node called a monitor node. Periodically monitor node is identified in the network.