计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (1): 132-134.

• 网络、通信与安全 • 上一篇    下一篇

高效的分级多群签名

陈瑞志,王国才   

  1. 中南大学 信息科学与工程学院,长沙 410083
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-01-01 发布日期:2008-01-01
  • 通讯作者: 陈瑞志

Efficient rank multi-group signature

CHEN Rui-zhi,WANG Guo-cai   

  1. School of Information Science and Engineering,Central South University,Changsha 410083,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-01-01 Published:2008-01-01
  • Contact: CHEN Rui-zhi

摘要: 现有的群签名方案均假设群成员具有相同的权限,论文首次提出分级多群签名概念,并通过在一般的多群签名中加入一个授权过程实现了分级多群签名。该方案中,群成员具有不等的安全签名权限,任何群成员均不能对一个超出自己签名权限的消息产生有效的签名,验证者可以通过公开的消息权限标志来验证签名;在新方案中,可信中心在撤消一个成员时仅需要两次乘法运算来更新EF,签名和验证算法的计算量均独立于目前群成员个数和被撤消的成员个数,因而算法是高效的。

关键词: 知识签名, ACJT, 权限, 分级多群签名

Abstract: The notion of rank multi-group signature is proposed for the first time,and a concrete scheme is given as well.Different group members have different signing ability in the scheme,and no one can sign a message out of his purview.Meanwhile,the scheme satisfies ordinary security properties of group signature.The solution is efficient in that it only needs two multiplication to update the E and F for the creditable center to exclude one group member,and the signing and verifying procedure is independent of the number of the current and excluded group members,so it is efficient.

Key words: signature of knowledge, ACJT, purview, rank multi-group signature