Abstract
Recent advancements in wireless communication and the miniaturization of computers have led to a new concept called the mobile ad hoc network (MANET), where two or more mobile nodes can form a temporary network without need of any existing network infrastructure or centralized administration. Even if the source and the destination mobile hosts are not in the communication range of each other, data packets are forwarded to the destination mobile host by relaying the transmission through other mobile hosts which exist between the two mobile hosts. Since no special infrastructure is required, in various fields such as military and rescue affairs, many applications are expected to be developed for ad hoc networks. Nevertheless, the exposed medium and wide distribution of nodes make MANET vulnerable to malicious attackers. In this situation, it is necessary to develop efficient intrusion-detection mechanisms to protect MANET from attacks. Since MANETs is used in many applications it isnecessary to provide more security. In this paper, we suggest and implement a new intrusion-detection system named Enhanced Adaptive Acknowledgment (EAACK) with cluster based communicationspecifically designed for MANETs. Compared to current approaches, EAACK with cluster based communication demonstrates higher malicious-behavior-detection rates in certain environments.
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