Cryptanalysis and improvement of universal designated veri?er ring signature

Computer Engineering and Applications ›› 2012, Vol. 48 ›› Issue (2): 106-108.

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Cryptanalysis and improvement of universal designated veri?er ring signature

CHEN Qiqing1，2, WANG Huaqun1，2

1.School of Information Engineering, Dalian Ocean University, Dalian, Liaoning 116023, China
2.State Key Lab of ISN, Xidian University, Xi’an 710071, China

Received:1900-01-01 Revised:1900-01-01 Online:2012-01-11 Published:2012-01-11

一种通用的指定验证者环签名方案的改进

陈齐清1，2，王化群1，2

1.大连海洋大学信息工程学院，辽宁大连 116023
2.西安电子科技大学综合业务网国家重点实验室，西安 710071

Abstract

Abstract: The general notion of universal designated verifier ring signature（UDVRS） is introduced in 2006 by Li and Wang.The scheme allows signer to designate a designated verifier and generate a designated verifier ring signature，so that only designated verifier can verify the ring signature.The security of the ring signature schemes is analyzed，and it is found that the scheme not satisfy the property of designated verifier.To guard against the flaw，Li-Wang（2006） universal designated verifier ring signature scheme is improved，and the improved scheme is provably secure.

Key words: ring signature, designated verifier ring signature, bilinear pairings

摘要： Li-Wang（2006）提出了一种通用指定验证者环签名方案（UDVRS）。该方案允许签名者指定一个验证者并产生一个指定验证者环签名，使得只有指定验证者才能验证该环签名。通过对Li-Wang提出的通用环签名方案进行分析，指出了该方案并不满足指定验证者性质，给出了攻击方法。为避免该缺陷，对Li-Wang通用指定验证者环签名方案进行改进，改进后的方案是可证安全的。

关键词: 环签名, 指定验证者环签名, 双线性对

CHEN Qiqing1，2, WANG Huaqun1，2. Cryptanalysis and improvement of universal designated veri?er ring signature[J]. Computer Engineering and Applications, 2012, 48(2): 106-108.

陈齐清1，2，王化群1，2. 一种通用的指定验证者环签名方案的改进[J]. 计算机工程与应用, 2012, 48(2): 106-108.

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Cryptanalysis and improvement of universal designated veri?er ring signature

一种通用的指定验证者环签名方案的改进

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