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Authors: Mebae Ushida 1 ; Kazuo Ohta 1 ; Yutaka Kawai 2 and Kazuki Yoneyama 3

Affiliations: 1 University of Electro Communication, Japan ; 2 The University of Tokyo, Japan ; 3 NTT Information Sharing Platform Laboratories, Japan

ISBN: 978-989-8425-18-8

Keyword(s): Designated verifier signature, Proxy, Strong unforgeability.

Related Ontology Subjects/Areas/Topics: Cryptographic Techniques and Key Management ; Information and Systems Security ; Public Key Crypto Applications

Abstract: Designated Verifier Signature (DVS) guarantees that only a verifier designated by a signer can verify the “validity of a signature”. In this paper, we propose a new variant of DVS; Proxiable Designated Verifier Signature (PDVS) where the verifier can make a third party (i.e. the proxy) substitute some process of the verification. In the PDVS system, the verifier can reduce his computational cost by delegating some process of the verification without revealing the validity of the signature to the proxy. In all DVS systems, the validity of a signature means that a signature satisfies both properties that (1) the signature is judged “accept” by a decision algorithm and (2) the signature is confirmed at it is generated by the signer. So in the PDVS system, the verifier can make the proxy substitute checking only the property of (1). In the proposed PDVS model, we divide verifier’s secret keys into two parts; one is a key for performing the decision algorithm, and the other is a key for ge nerating a dummy signature, which prevents a third party from convincing the property (2). We also define security requirements for the PDVS, and propose a PDVS scheme which satisfies all security requirements we define. (More)

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Paper citation in several formats:
Ushida M.; Ohta K.; Kawai Y.; Yoneyama K. and (2010). PROXIABLE DESIGNATED VERIFIER SIGNATURE.In Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2010) ISBN 978-989-8425-18-8, pages 344-353. DOI: 10.5220/0002979403440353

@conference{secrypt10,
author={Mebae Ushida and Kazuo Ohta and Yutaka Kawai and Kazuki Yoneyama},
title={PROXIABLE DESIGNATED VERIFIER SIGNATURE},
booktitle={Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2010)},
year={2010},
pages={344-353},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002979403440353},
isbn={978-989-8425-18-8},
}

TY - CONF

JO - Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2010)
TI - PROXIABLE DESIGNATED VERIFIER SIGNATURE
SN - 978-989-8425-18-8
AU - Ushida, M.
AU - Ohta, K.
AU - Kawai, Y.
AU - Yoneyama, K.
PY - 2010
SP - 344
EP - 353
DO - 10.5220/0002979403440353

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