计算机工程与应用Issue(7)：85-88,4.DOI:10.3778/j.issn.1002-8331.1109-0011
两种无证书代理签名的密码学分析及改进
Cryptanalysis and improvement for two certificateless proxy signature schemes
陈林1
作者信息
- 1. 四川理工学院 计算机学院，四川 自贡 643000
- 折叠
摘要
Abstract
To reduce the computational costs, XU Chungen proposed a certificateless proxy signature scheme without pairing;ZHANG Junrong proposed a certificateless proxy ring signature scheme that combined the advantages of the certificateless cryp-tosystem, the proxy signature and the ring signature. By the cryptanalysis, the paper points out that XU’s scheme has a seriously flaw in the proxy key generation algorithm, which results in an agent cannot generate a valid proxy signature; the ZHANG’s scheme has the original signer’s key compromise attack, the public key replacement attack and the anonymity defect. To address the above problems, two improved schemes are proposed to make up the deficiencies existed in the two signature schemes above, and their computing performance is better than their prototypes.关键词
无证书/代理签名/环签名/双线性对/公钥替换攻击Key words
certificateless/proxy signature/ring signature/bilinear pairing/public key replacement attack分类
信息技术与安全科学引用本文复制引用
陈林..两种无证书代理签名的密码学分析及改进[J].计算机工程与应用,2013,(7):85-88,4.
