A practical and provably secure coalition-resistant group signature scheme

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A practical and provably secure coalition-resistant group signature scheme (2000)

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by Giuseppe Ateniese , Jan Camenisch , Marc Joye , Gene Tsudik

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276 - 29 self

BibTeX

@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).

Keyphrases

group signature scheme signature originator identity escrow scheme identity escrow form group signature proven secure designated entity decisional diffie-hellman assumption strong rsa secure group signature companion identity noninteractive variant group member group identification scheme revocable anonymity interactive counterpart random oracle model fiat-shamir heuristic

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