Abstract: The Leader election process is done in the presence of selfish nodes for intrusion detection in mobile ad hoc networks (MANETs). The leader-IDS election process can be either random or based on the connectivity model. Unfortunately, with the random model, each node is equally likely to be elected regardless of its remaining resources. The connectivity index-based approach elects a node with a high degree of connectivity even though the node may have little resources left. Due to limited battery power nodes die out early and affect the network lifetime.