Abstract — Ad hoc networks are a new wireless paradigm for mobile hosts. Unlike traditional mobile ad hoc networks, ad hoc do not rely on any fixed infrastructure. The mobile ad hoc networks suffer from security attacks and privacy issues which dramatically impede their applications. To cope with the attacks, a large variety of intrusion detection techniques such as authentication, authorization, cryptographic protocols and key management schemes have been developed. A mobile node would be capable of moving to a particular position to establish network connectivity, provided it knows its current position and positions of other mobile node. Clustering methods allow fast connection, better routing and topology management of mobile ad hoc networks (MANET). This paper, we have introduced new mechanism called Secure Clustering and Energy Efficient Protocol (SCEEP) is to divide the MANET into a set of 2-hop clusters where each node belongs to at least one cluster. The nodes in each cluster elect a leader node (cluster head) to serve as the IDS for the entire cluster. To balance the resource consumption weight based leader election model is used, which elected an optimal collection of leaders to minimize the overall resource consumption and obtaining secure communication using diffie-Hellman key exchange protocol
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