Welcome to the resource topic for 2004/316
Title:
On a Threshold Group Signature Scheme and a Fair Blind Signature Scheme
Authors: Zhengjun Cao
Abstract:In the paper, we analyze two signature schemes.
The first is a (t_j, t, n) threshold group
signature scheme proposed by Shi and Feng in [1]. The second
is a fair blind signature scheme proposed by Feng in [2]. Our
results show that both schemes are forgeable.
Besides, we introduce a concept, i.e., suspended factor, to describe the common error in designing signature scheme, which means that some signature data lie at neither base position nor exponent position in verifying equation, instead lie at factor position solely .
ePrint: https://eprint.iacr.org/2004/316
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