Paper 2025/117 Original: eprint.iacr.org/2025/117 ↗
Post-Quantum Online/Offline Signatures
Abstract
Post-quantum signatures have high costs compared to RSA and ECDSA, in particular for smart cards. A line of work originating from Even, Goldreich, and Micali (CRYPTO'89) aimed to reduce digital signature latency by splitting up signing into an online and offline phase. The online/offline paradigm combines an ordinary long-term signature scheme with a fast, generally one-time, signature scheme. We reconsider this paradigm in the context of lattice-based post-quantum signatures in the GPV framework, with an example instantiation based on Falcon.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2025-02-03: last updated
- 2025-01-24: published
- Short URL
- https://ia.cr/2025/117
- License
- https://creativecommons.org/publicdomain/zero/1.0/
BibTeX
@misc{cryptoeprint:2025/117,
author = {Martin R. Albrecht and Nicolas Gama and James Howe and Anand Kumar Narayanan},
title = {Post-Quantum Online/Offline Signatures},
howpublished = {Cryptology {ePrint} Archive, Paper 2025/117},
year = {2025},
url = {https://eprint.iacr.org/2025/117}
}