Performance Evaluation of Comprehensive Node Acknowledgement (CNA) Based IDS in MANET

MANET is a infrastructure less network with dynamically changing topologies and random communicating node. Here the mobile nodes communicate directly to other nodes without any router and hence the desired functionalities are embedded to each node. As the network is made of mobile nodes with less hardware configurations and requirements than a router, thus routing and its protocols used here is of lightweight functionalities. The protocol range of MANET is categorizes into two areas: Proactive and Reactive. This work deals with improving network security through intrusion detection for AODV reactive protocol. The nodes which are working towards making towards the degradation of the normal network performance is known as malicious or attacker nodes. The kind of traffic generated by such node is malicious and affects the network lifetime and other performance factors. Also the intruder’s nodes aim towards modification of actual information of the packets and forge them for diverting the traffic through these malicious nodes which later on dropped or delayed. Thus such intruder’s nodes needs to be identified timely for making the network communication safe and secure. During the last few years various approaches had been suggested along with several intrusion detection systems. Though there are some problems which remain unaddressed and are not resolved as required. In presence of these nodes or in delays of such detection the networks performance gets down continuously. This paper proposes a novel scheme based on CNA (Comprehensive Node Acknowledgement) for AODV in MANET. The scheme is capable of detecting the intruders node by rcontinuously analysing the networkj parameters and getting the acknowledgement counts. It also serve as a regular monitoring which access the behaviour of each nodes. Result evaluation and compariosn makes the actual assessment of the suggested appraoch and proves to be improved that traditional approahces.