Paper 2021/387
Quantum-access security of the Winternitz one-time signature scheme
Christian Majenz, Chanelle Matadah Manfouo, and Maris Ozols
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. MINOR revision.
- Keywords
- quantumquantum access modelunforgeabilityone-time signatureshash-based signatureLamportWinternitz
- Contact author(s)
-
christian majenz @ gmail com
cmatadah @ quantumleapafrica org
marozols @ gmail com - History
- 2021-06-24: revised
- 2021-03-27: received
- See all versions
- Short URL
- https://ia.cr/2021/387
- License
-
CC BY
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}
}
