基于DSA的适合大群体的有效群签名

群签名体制允许群成员代表群进行签名，签名可以只用群公钥进行验证，并且不能透露签名者的身份。只有指定的群管理员能够揭示发出签名的签名者的身份，在以前提出的大部分群签名体制中，群公钥的长度至少和群成员数是线性的，因此验证算法的运行时间依赖于群成员的个数，构造了一种新的群签名体制，它将克服这些问题，并且在增加新成员时不用进行公钥的修改，实现的方法是基于DSA的知识签名。

An Efficient Group Signature Scheme for Large Group on DSA

A group signature scheme allows members of a group to sign messages on the group's behalf such that the resulting signature does not reveal their identity. Signature can be verified with respect to a single group public key. Only a designated group manager is able to identify the group member who issued a given signature. Previously proposed realizations of group signature schemes have the undesirable property that the length of the public key is linear in the size of the group and therefore the running time of the verification algorithm depends on the number of group members. In this paper a new group signature scheme is proposed, which overcome these problems. Furthermore, the scheme allows the group manager to add new members to the group without modifying the public key. The realization is based on the knowledge of signature of DSA.