Design of Cross Layer Based Intrusion Detection Technique for Wireless Lan

In this chapter, a cross-layer based intrusion detection technique for wireless networks is proposed. The proposed technique uses a combined weight value that is computed from the received signal strength (RSS) and time taken for RTS-CTS Handshake (TT). 3.1 Introduction The rapid proliferation of wireless local area networks has changed the landscape of network security. The traditional way of protecting networks with firewalls and encryption software is no longer sufficient and effective. There are number of new techniques available for detecting the 3.2.1 Specification-based techniques: In this technique, traces and ordered sequence of execution events are used to identify the intended behaviors of concurrent programs in a network [22, 93]. The drawback of this approach is that considerable amount of work has to be done to specify correctly the behavior of the many privileged system programs. The drawback of this approach is that it is operating-system specific. 68 3.2.2 Radio Frequency Fingerprinting (RFF) based technique: This technique incorporates radio frequency fingerprinting (RFF) into a wireless intrusion detection system (IDS), for sensing Media access control (MAC) address spoofing attack which leads to the unauthorized deployment of network resources [15, 41, 42]. RFF technique identifies a transceiver which is based on the transient portion of the signal it produces. intrusion detection technique reduces the inaccuracies and augments the real-time response in the present intrusion detection techniques for WLAN [17].