Comparative Analysis of Architectures for Intrusion Detection Systems against DoS Attacks in MANETs based on Chi-Square Test

Abstract

A Mobile Adhoc Network (MANET) is a group of wireless nodes that can be dynamically organized as a multi-hop packet radio network without using any existing infrastructure or centralized administration. MANETs are susceptible to the variety of attacks that threaten their operation and the provided services. MANET is severely affected by Denial of Service (DoS) attacks which become a problem for internet users. Intrusion Detection System (IDS) may act as defensive mechanism which monitors network activities in order to detect malicious activities performed by intruders and initiate proper response to malicious activity. Several IDS architectures are proposed for detecting the malicious node. In this paper the following IDS architectures for DoS attack in MANET are compared based on Chi-Square test: i)Stand-alone ii)Cooperative iii)Hierarchical iv)Zone based approach using mobile agent. Also listed out the strengths and weaknesses of each IDS architecture. A cluster based cooperative and distributed IDS which uses multiple light weight agents and reduces the overhead of cluster head is proposed. Simulations based on NS2 are as shown.