A Fully-Functional Group Signature Scheme over Only Known-Order Group

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A Fully-Functional Group Signature Scheme over Only Known-Order Group
The concept of group signature allows a group member to sign message anonymously on behalf of the group. In the event of a dispute, a designated entity can reveal the identity of a signer. Previous group signature schemes use an RSA signature based membership certificate and a signature based on a proof of knowledge(SPK) in order to prove the possession of a valid membership certificate. In these schemes, SPK is generated over an unknown-order group, which requires more works and memory compared with a publicly-known-order group. Recently, a group signature based on a known-order group is proposed. However, it requires an unknown-order group as well as a known-order group. Furthermore, unfortunately, it does not provide the function of revocation. In this paper, we propose the group signature scheme based on only publicly-known-order groups. Our scheme improves the NybergRueppel signature to fit for generating membership certificates and uses SPKs over a cyclic group whose order is pub...
Atsuko Miyaji, Kozue Umeda
Added 20 Aug 2010
Updated 20 Aug 2010
Type Conference
Year 2004
Where ACNS
Authors Atsuko Miyaji, Kozue Umeda
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