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Nowadays with appearance of a wide range of wireless devices, security of Mobile Ad hoc Networks (MANET) became an important problem and Intrusion Detection System (IDS) can be deployed as a second line of defense in a MANET. In this paper, a monitoring nodes selection method with high battery power in these networks is presented. A three-phase detection scheme is proposed. In the first phase, unauthorized nodes and in the second phase, malicious nodes are detected. Finally in the third phase, nodes with the largest battery power as monitoring nodes are considered. So, with this scheme, some of nodes contribute in monitoring task and costs of network monitoring and intrusion detection system will be decreased.
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