ON THE SECURITY OF ADDING CONFIRMERS INTO DESIGNATED CONFIRMER SIGNATURES

Wataru Senga; Hiroshi Doi

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Paper

ON THE SECURITY OF ADDING CONFIRMERS INTO DESIGNATED CONFIRMER SIGNATURES

Topics: Public Key Crypto Applications

In Proceedings of the International Conference on Security and Cryptography - Volume 0ICETE, 249-256, 2009 , Milan, Italy

Authors: Wataru Senga and Hiroshi Doi

Affiliation: Institute of Information Security, Japan

Keyword(s): Designated confirmer signature, Digital signature, Bilinear groups.

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

Abstract: In designated confirmer signature (DCS) scheme, a signature can be verified only by interacting with a semitrusted third party, called the confirmer. In previous DCS schemes, a confirmer is designated at the time of the signature generation. So once the designated confirmer becomes unavailable, no one can verify the validity of the signature. In this paper, we introduce an extended DCS scheme which the confirmers can be added after the signature is generated. We give the new model and the security definitions, and propose the concrete scheme that is provably secure without random oracles.

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Paper citation in several formats:

Senga, W. and Doi, H. (2009). ON THE SECURITY OF ADDING CONFIRMERS INTO DESIGNATED CONFIRMER SIGNATURES. In Proceedings of the International Conference on Security and Cryptography (ICETE 2009) - SECRYPT; ISBN 978-989-674-005-4; ISSN 2184-3236, SciTePress, pages 249-256. DOI: 10.5220/0002234702490256

@conference{secrypt09,
author={Wataru Senga. and Hiroshi Doi.},
title={ON THE SECURITY OF ADDING CONFIRMERS INTO DESIGNATED CONFIRMER SIGNATURES},
booktitle={Proceedings of the International Conference on Security and Cryptography (ICETE 2009) - SECRYPT},
year={2009},
pages={249-256},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002234702490256},
isbn={978-989-674-005-4},
issn={2184-3236},
}

TY - CONF

JO - Proceedings of the International Conference on Security and Cryptography (ICETE 2009) - SECRYPT
TI - ON THE SECURITY OF ADDING CONFIRMERS INTO DESIGNATED CONFIRMER SIGNATURES
SN - 978-989-674-005-4
IS - 2184-3236
AU - Senga, W.
AU - Doi, H.
PY - 2009
SP - 249
EP - 256
DO - 10.5220/0002234702490256
PB - SciTePress