计算机与现代化

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 基于代理部分盲签名的离线电子现金方案

  

  1. 南京航空航天大学计算机科学与技术学院,江苏南京210016
  • 收稿日期:2014-12-01 出版日期:2015-04-27 发布日期:2015-04-29
  • 作者简介:周明(1990-),男,湖南澧县人,南京航空航天大学计算机科学与技术学院硕士研究生,研究方向:代理盲签名,电子现金; 王箭(1968-),男,教授,博士生导师,CCF会员,研究方向:应用密码学,安全系统分析与设计。

 An Off-line Electronic Cash Scheme Based on Proxy Partially-blind Signature Scheme

  1. College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2014-12-01 Online:2015-04-27 Published:2015-04-29

摘要: 代理盲签名结合了代理签名和盲签名的优点,在电子现金中广泛应用。但在大多数基于代理盲签名的电子现金系统中,电子现金的金额是不可见,而且恶意用户能伪造跟踪信息,因此不满足实用性和不可重复花费性。本文提出一个基于双线性对代理部分盲签名方案,其安全性可规约为Computational Diffie-Hellman(CDH)问题。在代理部分盲签名和知识签名的基础上,提出一个安全的电子现金方案,防止恶意用户伪造跟踪信息,实现电子现金重复花费检测。分析结果表明,该方案满足不可重复花费性、不可伪造性、匿名性和实用性。

关键词:  , 电子现金, 代理部分盲签名, 知识签名, 重复花费检测

Abstract: By combining the advantages of a blind signature with a proxy signature, a proxy blind signature can be widely applied in the electronic cash. However, in most of electronic cash system based proxy blind signature, electronic cash amount was invisible. And a malicious user forged the tracking information. So these schemes didn’t meet practicability and no double spending. The paper proposes a proxy partially-blind signature based bilinear parings. The signature is unforgeable under the Computational Diffie-Hellman assumption. On the basis of the new proxy partially-blind signature and signature of knowledge, this manuscript proposes an electronic cash scheme. The scheme can prevent a malicious forgery of tracking information and achieved double-spending detection. Analysis shows that the proposed scheme can satisfy no double spending, unforgeability, anonymity and practicality.

Key words:  electronic cash, proxy partially-blind, signature of knowledge, double-spending detection