Paper 2017/498 Original: eprint.iacr.org/2017/498 ↗
Full-State Keyed Duplex With Built-In Multi-User Support
Abstract
The keyed duplex construction was introduced by Bertoni et al.(SAC 2011) and recently generalized to full-state absorption by Mennink et al.(ASIACRYPT 2015). We present a generalization of the full-state keyed duplex that natively supports multiple instances by design, and perform a security analysis that improves over that of Mennink et al. in terms of a more modular security analysis and a stronger and more adaptive security bound. Via the introduction of an additional parameter to the analysis, our bound demonstrates a significant security improvement in case of nonce-respecting adversaries. Furthermore, by supporting multiple instances by design, instead of adapting the security model to it, we manage to derive a security bound that is largely independent of the number of instances.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2017-09-01: last updated
- 2017-06-01: published
- Short URL
- https://ia.cr/2017/498
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2017/498,
author = {Joan Daemen and Bart Mennink and Gilles Van Assche},
title = {Full-State Keyed Duplex With Built-In Multi-User Support},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/498},
year = {2017},
url = {https://eprint.iacr.org/2017/498}
}