A novel identity-based strong designated verifier signature scheme |
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Authors: | Baoyuan Kang [Author Vitae] Colin Boyd [Author Vitae] |
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Affiliation: | a School of Mathematical Sciences and Computing Technology, Central South University, Chang’sha, Hunan 410075, China b Information Security Institute, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia |
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Abstract: | Unlike ordinary digital signatures, a designated verifier signature scheme makes it possible for a signer to convince a designated verifier that she has signed a message in such a way that the designated verifier cannot transfer the signature to a third party. In a strong designated verifier signature scheme, no third party can even verify the validity of a designated verifier signature, since the designated verifier’s private key is required in the verifying phase. Firstly, this paper proposes the model of identity-based strong designated verifier signature scheme based on bilinear pairings by combining identity-based cryptosystem with the designated verifier signature scheme, and then, provides one concrete strong identity-based designated verifier signature scheme, which has short size of signature, low communication and computational cost. We provide security proofs for our scheme. |
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Keywords: | Cryptography Designated verifier signature Identity-based signature Bilinear pairings |
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