Mobile ad-hoc network security (MANET) is becoming a more entangle problem compared to other networks security. In ad hoc networks the nodes often leaves the network and rejoins frequently. So authentication plays a vital role when a node joins and rejoins into the network. In the existing system, the authentications of all nodes are done using Non-Interactive Zero Knowledge protocol (NIZKP). Due to some probability of soundness error, verifier will be easily convinced by false statement. As such NIZKP is not proved based on mathematical sense. Token-based re-authentication scheme is proposed to increase the security of network.
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