摘要
论文分析了现有的基于身份的盲签名和代理签名,发现这些系统都需要无条件信任私钥产生中心(PKG,PrivateKeyGenerator)。因为PKG可以计算系统内任何用户的私钥,当然可以伪造任何用户的盲签名和代理签名。论文在已有基于身份无可信中心签名的基础上提出了一个基于身份无可信中心的盲签名,同时提出了一个基于身份无可信中心的代理签名。分析表明,提出的盲签名和代理签名是安全有效的。
This paper analyzes the existing ID-based blind signatures and proxy signatures.It is found that these systems need to trust a PKG (Private Key Generator) unconditionally.Because PKG can compute the private key of any user in system,it can forge a blind signature or a proxy signature of any one.Based on the existing ID-based signature,a new ID-based blind signature without trusted PKG is proposed.Meanwhile,a new ID-based proxy signature without trusted PKG is also proposed.It is showed that our proposed blind signature and proxy signature are secure and effective.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第1期142-144,共3页
Computer Engineering and Applications
基金
国家自然科学基金资助项目(60372046)
华为基金资助项目(YSCB2005037NP)。