Group signature schemes are extended from ordinary digital signatures motivated by a variety of applications. 摘要群签名是对一般数字签名的一种扩展，有很多重要应用。
The cost of revoking a member and updating witness is smaller than the previous accumulators.The security of the new group signature scheme is proved. 撤销一个成员和更新证据所花费的代价比以前的累加器更小，而且证明了新的群签名的安全性。
