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In this paper, the authors present a hierarchical cluster-based IDS architecture for Mobile Ad-hoc NETworks (MANETs) that considers the mobility and energy of nodes in the cluster formation in order to improve detection accuracy and reduce energy consumption. The proposed architecture adopts and enhances the Mobility and Energy Aware Clustering Algorithm (MEACA), which is the most appropriate for IDS in MANETs, since it aims at forming mobility aware and energy efficient 1-hop clusters. The algorithm maximizes the clusters' stability by choosing nodes with relatively low mobility and high energy to be the cluster-heads and keeping the constructed clusters unchanged to the extent of their maximum possible lifetime.
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