Computer Engineering and Applications ›› 2013, Vol. 49 ›› Issue (22): 100-103.

Previous Articles     Next Articles

Analysis and improvement of new proxy signature scheme

YANG Li, ZHANG Jianzhong   

  1. College of Mathematics and Information Science, Shaanxi Normal University, Xi’an 710062, China
  • Online:2013-11-15 Published:2013-11-15

对一种新型代理签名方案的进一步分析和改进

杨  丽,张建中   

  1. 陕西师范大学 数学与信息科学学院,西安 710062

Abstract: In this paper, a new proxy signature scheme proposed by Lu Rong-bo et al. is given a detailed cryptanalysis. This paper points out that this scheme is not secure against public key substitution attack and proposes a method to attack the new scheme. Based on this, one improved scheme is given and concluded that it is not only secure against the original signer’s forgery attack effectively but also avoiding the problems of the original scheme. Compared with the original scheme, the new scheme is more security and has the same computation complexity.

Key words: digital signature, proxy signature, public key substitution attack, provable security

摘要: 通过对鲁荣波等人提出的新型代理签名方案进行分析,指出该方案不满足公钥替换攻击,并给出了攻击方法。在此基础上提出一种改进的代理签名方案,克服了原方案的安全缺陷,有效地防止原始签名人的伪造攻击。与原方案相比,改进的方案在效率不变的情况下具有更高的安全性。

关键词: 数字签名, 代理签名, 公钥替换攻击, 可证明安全