Paper 2020/023
Threshold Multi-Signature with an Offline Recovery Party
Riccardo Longo, Alessio Meneghetti, and Massimiliano Sala
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. MINOR revision.
- Keywords
- digital signaturesthreshold cryptographysecure multi-party computationcryptocurrencythreshold signatureprovable security
- Contact author(s)
-
riccardolongomath @ gmail com
almenegh @ gmail com
maxsalacodes @ gmail com - History
- 2020-01-09: revised
- 2020-01-09: received
- See all versions
- Short URL
- https://ia.cr/2020/023
- License
-
CC BY
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},
note = {\url{https://eprint.iacr.org/2020/023}},
url = {https://eprint.iacr.org/2020/023}
}
