Qiu-Gu-Chen变形群签名的改进体制

The improvement on Qiu-Gu-Chen variant group signature scheme

分析了Qiu-Gu-Chen变形群签名体制的不足之处,提出了一种改进的群签名体制.新体制具有匿名性,满足了群签名应有的基本条件;可以抵抗伪造攻击;可通过签名者对一个签名消息的特定标记,削弱群的管理者(GM)在群中的特定权限,从而可以抵抗GM的重放攻击.

Group signature is a kind of important signature system, and the number of the group can make signature stand for the group.We analysize the Qiu-Gu-Chen variant group signature scheme and improve it. The new scheme is a real group signature,which has full anonymity and can defend forgery attack and replay-attack.