摘要
Camenisch-Stadler群签名方案包括两个方案,其第一个方案已被证明不能抵抗联合攻击,且已有一些改进措施被提出。针对第一种改进提出了一种更简洁的联合攻击方案,并对一种更复杂的改进提出一种联合攻击,证明后者也是不安全的。并对其Camenisch-Stadler第二个方案给出一个联合攻击,证明其也不具有抗联合攻击性。分析了这些方案的共性及受攻击原理,最后给出了一个安全的群签名方案。
There are two schemes of the Camenisch-Stadler group signatures.The first scheme has been proved to be unsafe not being coalition resistant and some improvements have been proposed.A more simple attack scheme toward the first improvement is proposed,Then,another attack scheme toward a more complicated improvement is proposed to prove it＇s unsafe either.For the sceond scheme,an attack scheme is proposed to show that it＇s unsafe.Then,commonness of these schemes is analysed,an improved coalition resistant group signature scheme is put forward,
出处
《计算机工程与应用》
CSCD
北大核心
2006年第35期130-132,共3页
Computer Engineering and Applications
基金
国家自然科学基金资助项目(60173041)
湖南省自然科学基金项目资助(02JJY2094)。
关键词
密码学
群签名
联合攻击
cryptography
group signature
coalition attack
