Paper 2021/425
Related-Key Analysis of Generalized Feistel Networks with Expanding Round Functions
Yuqing Zhao, Wenqi Yu, and Chun Guo
Abstract
We extend the prior provable related-key security analysis of (generalized) Feistel networks (Barbosa and Farshim, FSE 2014; Yu et al., Inscrypt 2020) to the setting of expanding round functions, i.e., n-bit to m-bit round functions with n < m. This includes Expanding Feistel Networks (EFNs) that purely rely on such expanding round functions, and Alternating Feistel Networks (AFNs) that alternate expanding and contracting round functions. We show that, when two independent keys
Metadata
- Available format(s)
- Category
- Secret-key cryptography
- Publication info
- Preprint. MINOR revision.
- Contact author(s)
- yqZhao1997 @ 163 com
- History
- 2021-04-06: received
- Short URL
- https://ia.cr/2021/425
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/425, author = {Yuqing Zhao and Wenqi Yu and Chun Guo}, title = {Related-Key Analysis of Generalized Feistel Networks with Expanding Round Functions}, howpublished = {Cryptology {ePrint} Archive, Paper 2021/425}, year = {2021}, url = {https://eprint.iacr.org/2021/425} }