Paper 2016/197
Post-quantum Security of the CBC, CFB, OFB, CTR, and XTS Modes of Operation
Mayuresh Vivekanand Anand, Ehsan Ebrahimi Targhi, Gelo Noel Tabia, and Dominique Unruh
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
- Published elsewhere. Major revision. PQCrypto 2016
- DOI
- 10.1007/978-3-319-29360-8_4
- Keywords
- Post-quantum cryptographyBlock ciphersModes of operationIND-qCPA security.
- Contact author(s)
- unruh @ ut ee
- History
- 2016-02-24: received
- Short URL
- https://ia.cr/2016/197
- License
-
CC BY
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},
doi = {10.1007/978-3-319-29360-8_4},
url = {https://eprint.iacr.org/2016/197}
}
