On the Linkability of Two Schnorr Type ID-based Blind Signature Schemes
As a special anonymous signature, the blindness of blind signatures is an important property which distinguishes from the other signatures. And it makes it play an important role in electronic commerce. Recently, Huang et.al proposed seversal Schnorr Type ID-based blind signature schemes and claimed that these schemes were secure. Unfortunately, in the paper, we discuss the security of the first scheme and the three scheme of Huang et.als schemes. And the result shows that the two blind signature schemes are insecure, they exist a common flaw: linkability. Namely, they dont satisfy the blindness of blind signature. That is to say, the signer is able to link a valid message-signature pair obtained by some user. Finally, we give the corresponding attack on the two schemes and reason analysis to produce such attack.
blind signature security proof blindness Schnorr type, ID-based, unforgeabiliy
Zhang Jianhong Chen Hua Gao Shengnan Geng Qin
College of Sciences, North China University of Technology, Beijing 100144, China
国际会议
重庆
英文
747-751
2009-12-25（万方平台首次上网日期，不代表论文的发表时间）