一个代理盲签名方案的进一步改进

Improvement of a proxy blind signature scheme

文献[7]中给出了一个改进的代理盲签名方案,然而李方伟等人对WANG等人方案的链接性的攻击是错误的;在对李方伟等人的方案进行了分析之后提出了一个改进的方案,并对改进后的方案进行了相应的安全性分析和计算效率分析,结论是改进后的方案与原有的方案相比是一个更为安全高效的代理盲签名方案。

Recently, Li Fang- wei et al. presented forgeability and linkability attacks on WANG et al＇s proxy blind signature scheme and improved WANG et al＇s scheme, unfortunately LI et al＇s linkability attack is failed and the scheme still satisfies the unlinkability property; LI etal＇ s proxy blind sigrature scheme is analysised and impvroved, the new proxy blind signature scheme is of more security and higher efficiency.