A Practical and Provably Secure Coalition-Resistant Group Signature Scheme
A Practical and Provably Secure Coalition-Resistant Group Signature Scheme
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DOI：
10.1007/3-540-44598-6_16
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发表时间：
2000-08
期刊：
影响因子：
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通讯作者：
G. Ateniese;J. Camenisch;M. Joye;G. Tsudik
中科院分区：
文献类型：
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作者：
G. Ateniese;J. Camenisch;M. Joye;G. Tsudik
群签名方案允许群成员代表群匿名地签署消息。但是，在发生争议的情况下，签字制作人的身份（只能）由指定的实体透露。群签名的交互式对等体是身份托管方案或具有可撤销匿名性的群身份认证方案。本文提出了一个新的可证明安全的群签名方案和一个伴随的身份托管方案，该方案在强RSA和判定性Diffie-Hellman假设下，以交互式的身份托管形式证明了该方案的安全性和抗联盟性。非交互式变体的安全性，即，群签名方案还依赖于Fiat-Shamir启发式（也称为随机预言模型）。
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 non-interactive variant, i.e., the group signature scheme, relies additionally on the Fiat-Shamir heuristic (also known as the random oracle model).