| A Group-Oriented （t,n） Threshold Signature Scheme with Traceable Signers |
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| 作者姓名： | TAN Zuowen |
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| 作者单位： | [1]School of Information Technology, Jiangxi University of Finance and Economics, Nanchang 330013, Jiangxi, China; [2]State Key Laboratory of Information Security/Institute of Software, Chinese Academy of Sciences, Beijing 100190, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （10701040）, National Key Technology Research and Development Program of China （2006BAJ05A01） and the Scientific Research Fund of Jiangxi Provincial Education Department, China （273） |
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| 摘 要： | A group-oriented （t, n） threshold signature scheme employs the cryptographic techniques of secret share, allows any subset of t players out of n players to sign message on behalf of the group and disallows the creation of a valid signature if fewer than t players take part in the signature protocol. In this paper, we proposed a new group-oriented （t, n） threshold signature schemes with traceable signers based on Schnorr signature. The proposed scheme is proved traceable, robust and unforgeable against the ＂static＂ adversary with the discrete logarithm assumption in the random oracle model and existence of broadcast channel. The proofs of the strongest security （existential unforgeability against adaptively chosen message attacks under the discrete logarithm assumption） are provided in the random oracle model.
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| 关 键 词： | 阈值签名 密码系统 随机数据库模型 计算机安全 |
A group-oriented (<Emphasis Type="Italic">t,n</Emphasis>) threshold signature scheme with traceable signers |
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| TAN Zuowen.A group-oriented (t,n) threshold signature scheme with traceable signers[J].Wuhan University Journal of Natural Sciences,2008,13(6):680-684. |
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| Authors: | Zuowen Tan |
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| Institution: | (1) School of Information Technology, Jiangxi University of Finance and Economics, Nanchang, 330013, Jiangxi, China;(2) State Key Laboratory of Information Security/Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China |
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| Abstract: | A group-oriented (t, n) threshold signature scheme employs the cryptographic techniques of secret share, allows any subset of t players out of n players to sign message on behalf of the group and disallows the creation of a valid signature if fewer than t players take part in the signature protocol. In this paper, we proposed a new group-oriented (t, n) threshold signature schemes with traceable signers based on Schnorr signature. The proposed scheme is proved traceable,
robust and unforgeable against the “static” adversary with the discrete logarithm assumption in the random oracle model and
existence of broadcast channel. The proofs of the strongest security (existential unforgeability against adaptively chosen
message attacks under the discrete logarithm assumption) are provided in the random oracle model.
Biography: TAN Zuowen(1967–), male, Associate professor, research direction: cryptography and information security. |
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| Keywords: | threshold signature random oracle model robustness |
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