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In this paper, we propose an anonymous protocol to secure nodes which have important roles in the network. We focus in the clustering approach to secure the mobile ad hoc networks (MANETs). In each cluster, a confident node is selected to ensure the certification authority (CA) roles; however, the cluster security depends in the security of the CA node. Therefore, we present an anonymous dynamic demilitarized zone (ADDMZ) to protect the CA node identity and to avoid the single point of failure in the cluster. ADDMZ is formed by a set of confident nodes which have a high trust level between them and their goal is to filter the communication between the cluster member node and the CA node. Moreover, we draw one's inspiration from military defence mechanisms such as: camouflage and identity change mechanisms. We present protocol to realize these mechanisms by using the identity based cryptographic from bilinear maps. The security analysis is proposed to discuss the proposed protocols.
Date of Conference: Nov. 30 2008-Dec. 4 2008