Efficient Certificate Revocation with Vindication Capability for Mobile Ad-Hoc Networks

Abstract – Mobile ad-hoc networks are self-organizing and self configurable with an open network environment. The nodes in this network can join and leave the network freely. Therefore, the wireless and dynamic natures of MANET make them more vulnerable to various types of security attacks than their wired counterparts. To guarantee the secure network services certificate revocation is an important integral component. In our proposed scheme, when the certificate of a malicious node is revoked, it is denied from all activities and isolated from the network. In this paper we propose Certificate Revocation with Vindication Capability scheme which gives quick and accurate certificate revocation. To improve the reliability of scheme warned nodes are recovered to take part in the certificate revocation process. We propose a new method to enhance the effectiveness and efficiency of the scheme by employing a threshold based approach to restore a node’s accusation ability and to ensure sufficient normal nodes to accuse malicious nodes in MANETs. The performances of our scheme are evaluated by both numerical and simulation analysis. Extensive results demonstrate that the proposed certificate revocation scheme is effective and efficient to guarantee secure communications in mobile ad hoc networks