EAACK-A Secure Intrusion-Detection System for MANETs

Abstract

The migration to wireless network from wired network has been a global trend in the past few decades. The mobility and scalability brought by wireless network made it possible in many applications. Mobile Ad hoc Network (MANET) is one of the most important and unique applications. MANET does not require a fixed network infrastructure; every single node works as both a transmitter and a receiver. Nodes communicate directly with each other when they are both within the same communication range. Otherwise, they rely on their neighbors to relay messages. The self-configuring ability of nodes in MANET made it popular among critical mission applications like military use or emergency recovery. The open medium and wide distribution of nodes make MANET vulnerable to malicious attackers. With the improvements of the technology and cut in hardware costs, we are witnessing a current trend of expanding MANETs into industrial applications. So we required the strong security from outside networks.so we propose and implement a new Intrusion-detection system named Enhanced Adaptive Acknowledgment (EAACK) specially designed for MANETs. EAACK demonstrates higher malicious- behavior-detection rates in certain circumstances while does not greatly affect the network performances. Also we adopting hybrid cryptography techniques to further reduce the network overhead caused by digital signature.

Existing System

By definition, Mobile Ad hoc NETwork (MANET) is a collection of mobile nodes equipped with both a wireless transmitter and a receiver that communicate with each other via bidirectional wireless links either directly or indirectly. Unfortunately, the open medium and remote distribution of MANET make it vulnerable to various types of attacks. For example, due to the nodes’ lack of physical protection, malicious attackers can easily capture and compromise nodes to achieve attacks. In particular, considering the fact that most routing protocols in MANETs assume that every node in the network behaves cooperatively with other nodes and presumably not malicious, attackers can easily compromise MANETs by inserting malicious or noncooperative nodes into the network. Furthermore, because of MANET’s distributed architecture and changing topology, a traditional centralized monitoring technique is no longer feasible in MANETs. In such case, it is crucial to develop an intrusion-detection system (IDS) specially designed for MANETs. three existing approaches, namely, Watchdog , TWOACK , and Adaptive ACKnowledgment (AACK).

Proposed System

In fact, many of the existing IDSs in MANETs adopt an acknowledgment-based scheme, including TWOACK and AACK. The functions of such detection schemes all largely depend on the acknowledgment packets. Hence, it is crucial to guarantee that the acknowledgment packets are valid and authentic. To address this concern, we adopt a digital signature in our proposed scheme named Enhanced AACK (EAACK).

Architecture