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The Wireless Sensor Networks (WSN) are particularly vulnerable to various attacks at different layers of the protocol stack. Many Intrusion Detection System (IDS) have been proposed to secure WSNs. But all these systems operate in a single layer of the OSI model, or do not consider the interaction and collaboration between these layers. Consequently these systems are mostly inefficient and would drain out the WSN. In this paper, they propose a new intrusion detection system based on cross layer interaction between the network, Mac and physical layers.
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