wireless ad hoc networking

Chapter 20
Intrusion Detection for
Wireless Network
Cynthia Kersey, Zhenwei Yu, and Jeffrey J.P. Tsai
20.1 Introduction
Recently, there has been a rapid proliferation of wireless devices and the
use of wireless networking. Two types of wireless networks, mobile ad -hoc
networks (MANETs) and wireless sensor networks (WSNs), have attracted
many researchers’ attention and have been demonstrated with various
applications in many areas. While these networks provide immense flexibility
they have an increased vulnerability to attacks and intrusions. Because
of this increased vulnerability, intrusion prevention alone does not solve
the problem and intrusion detection takes on an enhanced role in these
wireless networks. In this chapter, we survey the current research in the
area of intrusion detection for these two types of wireless networks in two
parts. The first part will discuss intrusion detection for MANETs, while the
second part will focus on WSNs.
20.2 Background on Intrusion Detection
An intrusion is defined as an action that attempts to compromise the confidentiality,
integrity, or availability of a resource. 1 As the name states, an
intrusion detection system (IDS) is a system that detects a network intrusion.
It is often termed a second line of defense because it is only activated
when the intrusion prevention system has failed. Ideally, such a system can
detect, identify, and eject an intruder before any damage is done. In this
505