Paper 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
- Published elsewhere. Minor revision. CT-RSA 2025
- Keywords
- Post-Quantum Cryptography
- Contact author(s)
-
martin albrecht @ sandboxaq com
nicolas gama @ sandboxaq com
james howe @ sandboxaq com
anand kumar @ sandboxaq com - History
- 2025-02-03: revised
- 2025-01-24: received
- See all versions
- Short URL
- https://ia.cr/2025/117
- License
-
CC0
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} }