摘要
针对三个新提出的群签名方案进行了分析,证明了这三个方案均不是安全的,无法抵抗本文提出的联合攻击。群中任何两个成员合作即可提取出生成身份证书的重要参数,从而伪造出新的密钥及身份证书对,从而可以得到无法跟踪的群签名。
In this paper,we analysis three new group signatures.we find that they all don＇t satisfy the secure property of coalition resis- tance,any two signers could work out a key value in obtaining membership certificate by their private keys and certificates,so that they can forge new private keys and certificates to sign on behalf of the group and the signature is untraceable by the group manager.
出处
《微计算机信息》
北大核心
2007年第30期84-85,309,共3页
Control & Automation
基金
国家自然科学基金项目(60173041)
关键词
密码学
群签名
联合攻击
cryptography. group signature, coalition attack.
