Cryptology ePrint Archive: Report 2005/062
Cryptanalysis of One Fair E-cash System
LiHua Liu and Zhengjun Cao
Abstract: One fair e-cash system was proposed in .
In this paper, we show that the system is insecure.
Besides, we point out that there are two drawbacks. One is that
those integer intervals for $s_i (i=1, \cdots, 9)$ are unappropriate. The other is that the datum $s_3$ in signature data is redundant.
Moreover, we give a minute description of the technique to
shun the challenge in the scheme. We think the method is
a little interesting.
Category / Keywords: cryptographic protocols / Group signature, forgeability.
Date: received 26 Feb 2005, withdrawn 5 Apr 2005
Contact author: zjcamss at hotmail com
Available formats: (-- withdrawn --)
Version: 20050405:070446 (All versions of this report)
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