Paper 2021/1587
Low-Bandwidth Threshold ECDSA via Pseudorandom Correlation Generators
Damiano Abram, Ariel Nof, Claudio Orlandi, Peter Scholl, and Omer Shlomovits
Abstract
Digital signature schemes are a fundamental component of secure distributed systems, and the theft of a signing-key might have huge real-world repercussions e.g., in applications such as cryptocurrencies. Threshold signature schemes mitigate this problem by distributing shares of the secret key on several servers and requiring that enough of them interact to be able to compute a signature. In this paper, we provide a novel threshold protocol for ECDSA, arguably the most relevant signature scheme in practice. Our protocol is the first one where the communication complexity of the preprocessing phase is only logarithmic in the number of ECDSA signatures to be produced later, and it achieves therefore a so-called silent preprocessing. Our protocol achieves active security against any number of arbitrarily corrupted parties.
Note: Updated efficiency
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. IEEE S&P 2022
- Keywords
- Threshold ECDSAPCG
- Contact author(s)
-
damiano abram @ cs au dk
ariel nof @ cs technion ac il
orlandi @ cs au dk
peter scholl @ cs au dk
omer shlomovits @ gmail com - History
- 2022-05-16: revised
- 2021-12-06: received
- See all versions
- Short URL
- https://ia.cr/2021/1587
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/1587,
author = {Damiano Abram and Ariel Nof and Claudio Orlandi and Peter Scholl and Omer Shlomovits},
title = {Low-Bandwidth Threshold {ECDSA} via Pseudorandom Correlation Generators},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/1587},
year = {2021},
url = {https://eprint.iacr.org/2021/1587}
}