Paper 2015/1157 Original: eprint.iacr.org/2015/1157 ↗
From Identification to Signatures, Tightly: A Framework and Generic Transforms
Abstract
This paper provides a framework to treat the problem of building signature schemes from identification schemes in a unified and systematic way. The outcomes are (1) Alternatives to the Fiat-Shamir transform that, applied to trapdoor identification schemes, yield signature schemes with tight security reductions to standard assumptions (2) An understanding and characterization of existing transforms in the literature. One of our transforms has the added advantage of producing signatures shorter than produced by the Fiat-Shamir transform. Reduction tightness is important because it allows the implemented scheme to use small parameters (thereby being as efficient as possible) while retaining provable security.
Metadata
- Available format(s)
PDF- Publication info
- Preprint.
- History
- 2016-09-04: last updated
- 2015-11-30: published
- Short URL
- https://ia.cr/2015/1157
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2015/1157,
author = {Mihir Bellare and Bertram Poettering and Douglas Stebila},
title = {From Identification to Signatures, Tightly: A Framework and Generic Transforms},
howpublished = {Cryptology {ePrint} Archive, Paper 2015/1157},
year = {2015},
url = {https://eprint.iacr.org/2015/1157}
}