Paper 2021/237 Original: eprint.iacr.org/2021/237 ↗
Post-quantum Security of OAEP Transform
Abstract
In this paper, we show that OAEP transform is indistinguishable under chosen ciphertext attack in the quantum random oracle model if the underlying trapdoor permutation is quantum partial-domain one-way. The existing post-quantum security of OAEP (TCC 2016-B ) requires a modification to the OAEP transform using an extra hash function. We prove the security of the OAEP transform without any modification and this answers an open question in one of the finalists of NIST competition, NTRU submission, affirmatively.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2021-07-20: last updated
- 2021-03-02: published
- Short URL
- https://ia.cr/2021/237
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2021/237,
author = {Ehsan Ebrahimi},
title = {Post-quantum Security of OAEP Transform},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/237},
year = {2021},
url = {https://eprint.iacr.org/2021/237}
}