Dual-verifiers DVS with message recovery for tolerant routing in wireless sensor networks
PAISI'11 Proceedings of the 6th Pacific Asia conference on Intelligence and security informatics
A short non-delegatable strong designated verifier signature
ACISP'12 Proceedings of the 17th Australasian conference on Information Security and Privacy
Non-delegatable strong designated verifier signature on elliptic curves
ICISC'11 Proceedings of the 14th international conference on Information Security and Cryptology
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In 1996, Jakobsson et al. proposed a designated verifier signature scheme in which only one specified person, called a designated verifier, can be convinced of the validity of the signature and the identity of the signer. This is possible by giving the designated verifier the ability to simulate a signature him/herself in an indistinguishable way. Therefore, the other third party cannot determine whether the signature is from the signer or the designated verifier. However, in some circumstances, the third party may be convinced that a signature intended for the designated verifier is actually generated by the signer. In 2003, Saeednia et al. proposed a strong designated verifier signature scheme to overcome this problem. However, we found that Saeednia et al.'s scheme would reveal the identity of the signer if the secret key of this signer is compromised. In this paper, we provide a new strong designated verifier signature scheme that provides signer ambiguity, even if the secret key of the signer is compromised. We also analyze the proposed scheme.