Cryptology ePrint Archive: Report 2017/817

A Universal Designated Verifier Signature Scheme with Non-Delegatability in the Standard Model

Parvin Rastegari and Mehdi Berenjkoub

Abstract: In a designated verifier signature (DVS) scheme a signer creates a signature which is only verifiable by a designated verifier. A DVS is a useful scheme for authenticating a signer without disturbing her privacy. In a universal DVS (UDVS) scheme, everyone who holds Alice's traditional signature on a message (the signature holder), is able to transform it to a DVS for a specific verifier. Non-delegatability is a critical property of a DVS scheme in applications where the responsibility of a signer is important and cannot be delegated to another entity. In this paper, we will propose a non-delegatable UDVS scheme and prove its security requirements in the standard model (without random oracles). To the best of our knowledge, our scheme is the first non-delegatable UDVS scheme and also by considering the signer herself as the signature holder, our scheme is also the first non-delegatable DVS scheme in the standard model.

Category / Keywords: Designated Verifier Signature, Universal Designated Verifier Signature, Non-Delegatability, Random Oracle Model, Standard Model

Date: received 28 Aug 2017, withdrawn 8 Nov 2017

Contact author: p rastegari at gmail com

Available format(s): (-- withdrawn --)

Version: 20171108:122849 (All versions of this report)

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