Paper 2020/023 Original: eprint.iacr.org/2020/023 ↗
Threshold Multi-Signature with an Offline Recovery Party
Abstract
Key custody is a sensitive aspect of cryptocurrencies. The employment of a custodian service together with threshold-multi-party signatures helps to manage secret keys more safely and effectively, e.g. allowing the recovery of crypto-assets when users lose their own keys. Advancing from a protocol by Gennaro et al. we propose a protocol with two main properties. First it allows the recovery party to remain offline during the enrollment of any user, solving a real-life problem of maintaining online only one trusted third party. Second our multi-party signature is compatible with a deterministic derivation of public and private keys.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2020-01-09: last updated
- 2020-01-09: published
- Short URL
- https://ia.cr/2020/023
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2020/023,
author = {Riccardo Longo and Alessio Meneghetti and Massimiliano Sala},
title = {Threshold Multi-Signature with an Offline Recovery Party},
howpublished = {Cryptology {ePrint} Archive, Paper 2020/023},
year = {2020},
url = {https://eprint.iacr.org/2020/023}
}