A practical and provably secure coalition-resistant group signature scheme (2000)
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@INPROCEEDINGS{Ateniese00apractical,
author = {Giuseppe Ateniese and Jan Camenisch and Marc Joye and Gene Tsudik},
title = {A practical and provably secure coalition-resistant group signature scheme},
booktitle = {},
year = {2000},
pages = {255--270},
publisher = {Springer-Verlag}
}
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Abstract
A group signature scheme allows a group member to sign messages anonymously on behalf of the group. However, in the case of a dispute, the identity of a signature’s originator can be revealed (only) by a designated entity. The interactive counterparts of group signatures are identity escrow schemes or group identification scheme with revocable anonymity. This work introduces a new provably secure group signature and a companion identity escrow scheme that are significantly more efficient than the state of the art. In its interactive, identity escrow form, our scheme is proven secure and coalition-resistant under the strong RSA and the decisional Diffie-Hellman assumptions. The security of the noninteractive variant, i.e., the group signature scheme, relies additionally on the Fiat-Shamir heuristic (also known as the random oracle model).
