Trust Based Certificate Revocation for Secure Routing in MANET

AbstractMany trust establishment solutions in mobile ad hoc networks (MANETs) rely on public key certificates. Therefore, they should be accompanied by an efficient mechanism for certificate revocation and validation. In order to reduce the hazards from nodes and to enhance the security of network we propose to develop a CA distribution and a Trust based threshold revocation method. Initially the trust value is computed from the direct and indirect trust values. And the certificate authorities distributes the secret key to al the nodes. Followed by this a trust based threshold revocation method is computed. Here the misbehaving nodes are eliminated

A trust based threshold revocation scheme for MANETs

Security is very important for the reliable operation of mobile Ad Hoc networks (MANETs). One of the critical security issues in MANETs is the revocation of misbehaving nodes. In this paper, we propose a trust based threshold cryptography revocation scheme for MANETs. In our proposed scheme, the master private key is split into n pieces according to a random polynomial. Each node in the proposed scheme is configured with a share ski of the CA private key SK, the node's public key pki, and the CA public key PK before joining the network. Meanwhile, the master private key could be recovered by combining any threshold t pieces based on Lagrange interpolation. Consequently, the proposed scheme improves the safety levels in MANETs. The proposed hop-by-hop certificate revocation scheme is based on both threshold cryptography and transitive trust between mobile nodes. Because of the decentralized nature of our proposed scheme, it enables a group of legitimate nodes to perform fast revocation of a nearby misbehaving node. The proposed scheme is highly robust in the mobility environment of MANETs. The advantages of the proposed scheme are justified through extensive simulations