No abstract

No abstract

The potential for rapid and infrastructure-less deployment in harsh geographic terrain as well as in conference-room like scenarios has propelled research on wireless ad hoc networks (MANETs). However, these networks are vulnerable to attackers due to certain inherently vulnerable characteristics. With intrusion prevention measures not guaranteed to work all the time, the need to constantly monitor what is going on in a system and look for intrusions is fulfilled by intrusion detection systems (IDS). In this paper, we have proposed a novel and robust IDS for MANETs that aims to combine misuse with anomaly detection. Our protocol-independent design makes use of a selfadjusting threshold scheme that detects a priori known attack patterns with over 90% accuracy and is generally insensitive to false alarms. Experimental results indicate the non-degradability of network performance when our IDS is incorporated in the routing algorithm for security enhancements.

Wireless mobile ad hoc networks @opularly known as MANETs) have been the focus of research in recent times. Rapid and infrastructure-less deployment in emergency and military situations make these nehvorks unique. However, certain inherently vulnerable characteristics lead to security concerns which can prove especially damaging in sensitive situations like militav operations. Intrusion prevention measures are not guaranteed to work all the time since unrelenting attackers can eventually break them down. An Intrusion Detection Scheme (ID$) monitors a netnork and looks for intrusions, thus forming a second wall of defense. In this paper, we have proposed a misuse detection -based IDS for W N E T s . Our protocolindependent design makes use o f a self-adjusting threshold scheme and detects a priori known attack patterns with over 90% accuracy and is generally insensitive to false alarms. Experimental validation has provided signipcant results about non-degradability of network performance with our IDS incorporated for security enhancements.