Attack for Wu-Wang blind signature scheme and its improvement

Computer Engineering and Applications ›› 2012, Vol. 48 ›› Issue (4): 77-78.

• 网络、通信、安全 • Previous Articles Next Articles

Attack for Wu-Wang blind signature scheme and its improvement

MA Donglan, ZHANG Jianzhong

College of Mathematics and Information Science, Shaanxi Normal University, Xi’an 710062, China

Received:1900-01-01 Revised:1900-01-01 Online:2012-02-01 Published:2012-04-05

对Wu-Wang盲签名方案的攻击与改进

马冬兰，张建中

陕西师范大学数学与信息科学学院，西安 710062

Abstract

Abstract: The security of blind signature scheme based on the discrete logarithm problem which is proposed by Wu-Wang is analyzed, and a security attack is given, that is, a signature requester can obtain valid signatures of two different messages at the same time through performing only one round of the protocol. A modified scheme is presented, in the signature phrase a random number is used by a signer to prevent this kind of attack, and its security is improved.

Key words: blind signature, unlinkability, security, attack scheme

摘要： 分析了Wu-Wang提出的基于离散对数问题的盲签名方案的安全性，给出了一个攻击，即签名请求者仅执行一次方案可以同时得到两则不同消息的有效签名。针对该攻击提出一种改进方案，通过在签名阶段引入一个随机数来抵抗此种攻击，使得方案安全性能提高。

关键词: 盲签名, 不可链接性, 安全性, 攻击方案

MA Donglan, ZHANG Jianzhong. Attack for Wu-Wang blind signature scheme and its improvement[J]. Computer Engineering and Applications, 2012, 48(4): 77-78.

马冬兰，张建中. 对Wu-Wang盲签名方案的攻击与改进[J]. 计算机工程与应用, 2012, 48(4): 77-78.

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Attack for Wu-Wang blind signature scheme and its improvement

对Wu-Wang盲签名方案的攻击与改进

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