计算机工程 ›› 2007, Vol. 33 ›› Issue (21): 140-141.doi: 10.3969/j.issn.1000-3428.2007.21.049

• 安全技术 • 上一篇    下一篇

一个改进的前向安全的代理签名方案

张晓敏,张建中   

  1. (陕西师范大学数学与信息科学学院,西安 710062)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-11-05 发布日期:2007-11-05

Improved Forward-secure Proxy Signature Scheme

ZHANG Xiao-min, ZHANG Jian-zhong   

  1. (Colledge of Mathematics and Information Science, Shaanxi Normal University, Xi’an 710062)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-11-05 Published:2007-11-05

摘要: 指出了一个前向安全签名方案的安全漏洞,认为原方案由于代理签名者的私钥不具有前向安全性,使得整个方案在代理签名者的私钥泄漏后不具有安全性。该文的改进方案对代理签名者的私钥进行了进化,在强RSA假定下,新方案具有真正的前向安全性。

关键词: 代理签名, 前向安全性, 强RSA假定

Abstract:

A secure problem in a forward-secure proxy signature scheme is pointed out, the proxy signer’s key does not satisfy the forward-security, so that the original scheme is insecure once the adversary gets the proxy signer’s key. The improved scheme proposes an evolution on proxy signer’s key, under the strong RSA assumption, the new scheme is truly forward secure.

Key words: proxy signature, forward-security, strong RSA assumption

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