计算机科学 ›› 2019, Vol. 46 ›› Issue (4): 172-176.doi: 10.11896/j.issn.1002-137X.2019.04.027
左黎明1,2, 陈祚松1,2, 夏萍萍1,2, 汤鹏志1, 康文洋1,2
ZUO Li-ming1,2, CHEN Zuo-song1,2, XIA Ping-ping1,2, TANG Peng-zhi1, KANG Wen-yang1,2
摘要： 无证书密码体制解决了PKI(Public Key Infrastructure)证书密码体制中证书的存储和管理问题,同时有效地解决了基于身份的密码系统中的密钥托管问题,一直是密码学研究中的一个热点。鉴于传统的无证书数字签名方案容易遭受公钥替换攻击的问题,对传统的无证书数字签名的定义进行了改进,并在此基础上提出了一种基于新定义的无证书短签名方案。在Inv-CDH(Inverse Computational Diffie-Hellman)困难问题假设和随机预言机模型下证明了方案的安全性,随后对方案进行了实现。最后对所提方案与几种经典方案进行了效率分析和实验比较,结果表明所提方案的计算量小,效率较高,适用于计算能力和传输能力较弱的应用场景。
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