Cryptology ePrint Archive: Report 2008/507

A non-delegatable identity-based strong designated verifier signature scheme

Bin Wang

Abstract: In a strong designated verifier signature scheme, no third party can verify the validity of a signature. On the other hand, non-delegatability, proposed by Lipmaa, Wang and Bao, is another stronger notion for designated verifier signature schemes. In this paper, we formalize a security model for non-delegatable identity based strong designated verifier signature (IDSDVS) schemes. Then a novel non-delegatable IDSDVS scheme based on pairing is presented. The presented scheme is proved to be non-delegatable, non-transferable and unforgeable under the Gap Bilinear Diffie-Hellman assumption.

Category / Keywords: public-key cryptography / Strong designated verifier signature, Non-delegatability, Bilinear pairing, Gap Bilinear Diffie-Hellman assumption, Random oracle model

Date: received 1 Dec 2008

Contact author: jxbin76 at yahoo cn

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Version: 20081202:021216 (All versions of this report)

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