Paper 2012/288 Original: eprint.iacr.org/2012/288 ↗
Fair Exchange of Short Signatures without Trusted Third Party
Abstract
We propose a protocol to exchange Boneh-Boyen short signatures in a fair way, without relying on a trusted third party. Our protocol is quite practical and is the first of the sort to the best of our knowledge. Our construction uses a new non-interactive zero-knowledge (NIZK) argument to prove that a commitment is the encryption of a bit vector. We also design a NIZK argument to prove that a commitment toa bit vector $v=(b_1,b_2,...,b_\secparam)$ is such that $\sum_{i \in [\secparam]}b_i2^{i-1}=\Blinding$ where $\Blinding$ is the discrete logarithm of some public value $D=g^\Blinding$. These arguments may be of independent interest.
Metadata
- Available format(s)
PDF- Publication info
- Preprint.
- History
- 2012-11-18: last updated
- 2012-05-29: published
- Short URL
- https://ia.cr/2012/288
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2012/288,
author = {Philippe Camacho},
title = {Fair Exchange of Short Signatures without Trusted Third Party},
howpublished = {Cryptology {ePrint} Archive, Paper 2012/288},
year = {2012},
url = {https://eprint.iacr.org/2012/288}
}