Paper 2022/1332
On the Classic Protocol for MPC Schnorr Signatures
Abstract
In this paper, we prove that the classic three-round protocol for MPC Schnorr Signatures is fully-adaptive UC-secure. Furthermore, we show that a simple variant of the Classic protocol achieves tight security, i.e.~the security of the resulting, modified, protocol tightly reduces to the security of the underlying non-MPC scheme.
Note: A new protocol is included that achieves tight security. The abstract and the intro were revised for clarity.
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Preprint.
- Keywords
- Schnorr SignaturesThreshold CryptographyUCAdaptive AdversariesMalicious Adversaries
- Contact author(s)
- n makriyannis @ gmail com
- History
- 2023-06-01: revised
- 2022-10-06: received
- See all versions
- Short URL
- https://ia.cr/2022/1332
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2022/1332,
author = {Nikolaos Makriyannis},
title = {On the Classic Protocol for MPC Schnorr Signatures},
howpublished = {Cryptology ePrint Archive, Paper 2022/1332},
year = {2022},
note = {\url{https://eprint.iacr.org/2022/1332}},
url = {https://eprint.iacr.org/2022/1332}
}
