Traceability on Low-Computation Partially Blind Signatures for Electronic Cash

Min-Shiang HWANG  Cheng-Chi LEE  Yan-Chi LAI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E85-A   No.5   pp.1181-1182
Publication Date: 2002/05/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Information Security
blind signature,  electronic cash,  quadratic residues,  untraceability,  

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In 1998, Fan and Lei proposed a partially blind signature scheme that could reduce the computation load and the size of the database for electronic cash systems. In this Letter, we show that their scheme could not meet the untraceability property of a blind signature.