Paper 2018/468 Original: eprint.iacr.org/2018/468 ↗
On Beyond-Birthday-Bound Security: Revisiting the Development of ISO/IEC 9797-1 MACs
Abstract
ISO/IEC 9797-1 is an international standard for block-cipher-based Message Authentication Code (MAC). The current version ISO/IEC 9797-1:2011 specifies six single-pass CBC-like MAC structures that are capped at the birthday bound security. For a higher security that is beyond-birthday bound, it recommends to use the concatenation combiner of two single-pass MACs. In this paper, we reveal the invalidity of the suggestion, by presenting a birthday bound forgery attack on the concatenation combiner, which is essentially based on Joux’s multi-collision. Notably, our new forgery attack for the concatenation of two MAC Algorithm 1 with padding scheme 2 only requires 3 queries. Moreover, we look for patches by revisiting the development of ISO/IEC 9797-1 with respect to the beyond-birthday bound security. More specifically, we evaluate the XOR combiner of single-pass CBC-like MACs, which was used in previous version of ISO/IEC 9797-1.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2020-12-30: last updated
- 2018-05-22: published
- Short URL
- https://ia.cr/2018/468
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2018/468,
author = {Yaobin Shen and Lei Wang},
title = {On Beyond-Birthday-Bound Security: Revisiting the Development of ISO/IEC 9797-1 MACs},
howpublished = {Cryptology {ePrint} Archive, Paper 2018/468},
year = {2018},
url = {https://eprint.iacr.org/2018/468}
}