摘要
利用无证书密码体制的安全模型,分析一种无证书数字签名方案,发现存在安全性缺陷.针对这些安全性缺陷,对原方案进行改进.其安全性基于一个经典的困难问题——计算Diffie-Hellman问题,使得改进方案是可证安全的.
With the help of a certificateless security model,a certificateless digital signature was analyzed and the security flaws were found.The original scheme was improved for these security flaws.Its security is based on a classical difficult problem——computing Diffie-Hellman problem.The improved scheme is provably secure.
出处
《平顶山学院学报》
2012年第2期59-64,共6页
Journal of Pingdingshan University
基金
河南省科技计划重点项目(102102210416)
关键词
无证书签名
双线性对
公钥替换攻击
随机预言模型
certificateless digital signature
public key substitution attack
bilinear pairings
random oracle model
