Paper 2021/387 Original: eprint.iacr.org/2021/387 ↗
Quantum-access security of the Winternitz one-time signature scheme
Abstract
Quantum-access security, where an attacker is granted superposition access to secret-keyed functionalities, is a fundamental security model and its study has inspired results in post-quantum security. We revisit, and fill a gap in, the quantum-access security analysis of the Lamport one-time signature scheme (OTS) in the quantum random oracle model (QROM) by Alagic et al.~(Eurocrypt 2020). We then go on to generalize the technique to the Winternitz OTS. Along the way, we develop a tool for the analysis of hash chains in the QROM based on the superposition oracle technique by Zhandry (Crypto 2019) which might be of independent interest.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2021-06-24: last updated
- 2021-03-27: published
- Short URL
- https://ia.cr/2021/387
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2021/387,
author = {Christian Majenz and Chanelle Matadah Manfouo and Maris Ozols},
title = {Quantum-access security of the Winternitz one-time signature scheme},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/387},
year = {2021},
url = {https://eprint.iacr.org/2021/387}
}