摘要
门限群签名是群签名中重要的一类,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一个有效的群签名.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-Hellman问题难解上.因此在计算上是安全的.
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.
出处
《数学研究》
CSCD
2008年第1期65-71,共7页
Journal of Mathematical Study
基金
国家自然科学基金(10371032)