An Efficient Acknowledgement based Intrusion-Detection System for MANETs

The migration of wired network into wireless network form has been a worldwide trend among the past few decades. A very attractive and promising category of wireless networks that has emerged is based on an Ad Hoc topology; these networks are called Wireless Ad Hoc Networks. The term wireless network implies a computer network in which the communication links are wireless. The term Ad Hoc comes from the fact that there is no fixed infrastructure for forwarding/ routing the packets. MANET does not need a set of network infrastructure; every single node works as each a transmitter and a receiver and they trust their neighbors to relay messages. Nodes communication directly with each other once they are in range intervals constant communication varies. The self-configuring ability of nodes in MANET created it modern among very important mission applications like military use or emergency recovery. In recent years, the security problems on MANET have become one of the primary concerns. MANET is more vulnerable to be attacked than a wired network. These vulnerabilities are nature of the MANET structure that can’t be retrieved. As a result, attacks with malicious intent have been and can be devised to exploit these vulnerabilities and to cripple the MANET operation. Attack prevention measures, such as authentication and encryption, are often used as the first line of defense for reducing the possibilities of attacks. But, these techniques have a limitation on the effects of prevention techniques in generally and that they are designed for a set of known attacks. They are unable to prevent newer attacks that are designed for circumventing the existing security measures. For this reason, there is a requirement of second mechanism to detect these newer attacks and which is none aside from intrusion detection system.