| A novel group signature with one time secret key |
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| 作者姓名： | 谢琪 于秀源 |
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| 作者单位： | Department of Mathematics，Zhejiang University，Hangzhou 310027，China，School of Information and Engineering，Hangzhou Teachers College，Hangzhou 310012，China，Department of Mathematics，Hangzhou Teachers College，Hangzhou 310012，China，Department of Mathematics and Physics，Quzhou College，Quzhou 324000，China |
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| 摘 要： | INTRODUCTION The concept of group signature, first introduced by Chaum and van Heyst (1992), allows each group member to sign messages on behalf of the group, and the receiver can use a group public key to verify the group signature, but cannot reveal the signer. In case of disputes, the group authority can open the group signature and identify the signer, but the outsider cannot identify all previous group signatures gener-ated by the same group member. A group member cannot impersonate…
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| 关 键 词： | 密码系统 聚合信号 离散对数 因式分解 数据安全 |
| 收稿时间： | 10 March 2004 |
| 修稿时间： | 20 September 2004 |
A novel group signature with one time secret key |
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| Xie Qi,Yu Xiu-yuan.A novel group signature with one time secret key[J].Journal of Zhejiang University Science,2005,6(6):560-564. |
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| Authors: | Xie Qi Yu Xiu-yuan |
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| Institution: | (1) Department of Mathematics, Zhejiang University, 310027 Hangzhou, China;(2) School of Information and Engineering, Hangzhou Teachers College, 310012 Hangzhou, China;(3) Department of Mathematics, Hangzhou Teachers College, 310012 Hangzhou, China;(4) Department of Mathematics and Physics, Quzhou College, 324000 Quzhou, China |
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| Abstract: | A new group signature with one time secret key is proposed. The main merits are that it only needs the trusted center issuing the partial secret key one time for each group member; and that the group member can generate his different secret key each time when he wants to sign a message. The group public key is constant and the size of the signature is independent of the number of group members. The total computation cost of signature and verification requires only 8 modular exponentiations. |
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| Keywords: | Cryptography Group signature Discrete logarithm problem Factoring problem |
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