中文摘要：

群签名方案是数字签名方案中非常重要的一种，允许群成员代表群进行签名而不泄露群成员的任何信息。而群签名方案中群成员的删除一直是一个难题。在此提出了一个基于网络认证的动态群签名方案，主要是为了解决群成员的删除问题。方案包括认证和签名2个模块，被删除的群成员在认证时就不能通过．在签名模块中利用ElGamal加密算法和知识签名等来构造群签名方案，使其具有抵抗攻击的能力．该方案中认证模块的效率高且可移植于其他类型的不具有删除群成员能力的群签名方案之中，可以解决不能删除群成员的难题。

英文摘要：

A group signature, which is an important type of digital signature, allows individual members in a group to sign on behalf of the group, while not disclosing information about any group member. One of the difficulties in a dynamic group signature lies in the deletion of group members. A dynamic group signa-ture scheme is proposed based on network authentication that can efficiently delete group members. The scheme includes two modules： an authentication module and a signature module. The authentication module ensures any deleted member can not log on to the system. In the signature module, the ElGamal algo-rithm and the signature of knowledge are used to construct the group signature scheme, making it capability of defending against any attack. In this scheme, the authentication module is very efficient and can be transplanted to other group signature schemes which cannot delete group members.