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基于MSP秘密共享的(t,n)门限群签名方案
引用本文:全俊杰,曾吉文,邹时华.基于MSP秘密共享的(t,n)门限群签名方案[J].数学研究,2008,41(1):65-71.
作者姓名:全俊杰  曾吉文  邹时华
作者单位:厦门大学数学科学学院,厦门,福建,361005
摘    要:门限群签名是群签名中重要的—类,它是秘钥共享与群签名的有机结合.本文通过文献5]中的MSP方案(Monotone Span Program),提出了一种新的门限群签名方案.在本签名方案建立后,只有达到门限的群成员的联合才能生成—个有效的群签名,并且可以方便的加入或删除成员.一旦发生争议,只有群管理员才能确定签名人的身份.该方案能够抵抗合谋攻击:即群中任意一组成员合谋都无法恢复群秘钥k.本方案的安全性基于Gap Diffie-Hellman群上的计算Diffie-Hellmanl可题难解上,因此在计算上是最安全的.

关 键 词:门限群签名  MSP秘钥共享方案  Gap  Diffie-Hellman群(GDH群)
修稿时间:2006年10月24

A (t,n) Threshold Group Signature Scheme Based on MSP Secret Sharing
Quan Junjie,Zeng Jiwen,Zou Shihua.A (t,n) Threshold Group Signature Scheme Based on MSP Secret Sharing[J].Journal of Mathematical Study,2008,41(1):65-71.
Authors:Quan Junjie  Zeng Jiwen  Zou Shihua
Institution:Quan Junjie Zeng Jiwen Zou Shihua (Department of Mathematics, Xiamen Univercity, Xiamen Fujian 361005)
Abstract:In this paper, a new (t, n) threshold group signature scheme is proposed based on Montone Span Programs. Wimn the scheme is built, a set of members whose number is ,aver the threshold can make a valid group signature. When the dispute occupys, signer. The schenm can withstand conspiracy attacks. of the computational Diffie-Hellman(CDH) problems. only the authority can determine who is the real The security of tiffs scheme is based on the harness Therefore, the schemes is secure for calculation.
Keywords:threshold group signature  monotone span programs secret sharing  Gap Diffie-Hellman group
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