Paper 2016/197 Original: eprint.iacr.org/2016/197 ↗
Post-quantum Security of the CBC, CFB, OFB, CTR, and XTS Modes of Operation
Abstract
We examine the IND-qCPA security of the wide-spread block cipher modes of operation CBC, CFB, OFB, CTR, and XTS (i.e., security against quantum adversaries doing queries in superposition). We show that OFB and CTR are secure assuming that the underlying block cipher is a standard secure PRF (a pseudorandom function secure under classical queries). We give counterexamples that show that CBC, CFB, and XTS are not secure under the same assumption. And we give proofs that CBC and CFB mode are secure if we assume a quantum secure PRF (secure under queries in superposition).
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2016-02-24: last updated
- 2016-02-24: published
- Short URL
- https://ia.cr/2016/197
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2016/197,
author = {Mayuresh Vivekanand Anand and Ehsan Ebrahimi Targhi and Gelo Noel Tabia and Dominique Unruh},
title = {Post-quantum Security of the CBC, CFB, OFB, CTR, and XTS Modes of Operation},
howpublished = {Cryptology {ePrint} Archive, Paper 2016/197},
year = {2016},
url = {https://eprint.iacr.org/2016/197}
}