Paper 2004/316 Original: eprint.iacr.org/2004/316 ↗
On a Threshold Group Signature Scheme and a Fair Blind Signature Scheme
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 .
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2004-11-19: last updated
- 2004-11-19: published
- Short URL
- https://ia.cr/2004/316
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2004/316,
author = {Zhengjun Cao},
title = {On a Threshold Group Signature Scheme and a Fair Blind Signature Scheme},
howpublished = {Cryptology {ePrint} Archive, Paper 2004/316},
year = {2004},
url = {https://eprint.iacr.org/2004/316}
}