摘要
提出一种基于离散对数的群签名方案。成员加入群时,认证中心(CA)验证成员身份,确保非法成员无法冒充合法成员加入群;成员退出群时,CA记录撤销时间,避免失效成员继续签名,成员签名需要得到CA认可方可发送给接收者,并且该签名也被群管理员记录在数据库中,以备将来发生纠纷时使用。分析表明,所提方案生成的签名信息具有准确性和防伪造性,并能识别非法成员伪造签名,具有一定的安全性。
A group signature scheme based in discrete logarithm is proposed. When a new member attend to join the group, the Certification Authority（CA） will validate the identify of this member to ensure the unauthorized members unable to join the group. When the member leaves the group, CA will record the withdraw time to avoid outdated members can continue to use the signature. The signature can only be sent to receiver after CA approved. And the signatures will be recorded in database by group administrator which can be reserved for future using. Analysis shows the signature generated by this proposed scheme satisfies sufficient security.
出处
《计算机安全》
2010年第3期32-33,共2页
Network & Computer Security
关键词
群签名
认证中心(CA)
数字签名
安全性
group signature
Certification Authority（CA）
digital signature
security
