Paper 2023/1233 Original: eprint.iacr.org/2023/1233 ↗
Tight Security of TNT: Reinforcing Khairallah's Birthday-bound Attack
Abstract
In a recent paper, Khairallah demonstrated a birthday-bound attack on TNT, thereby invalidating its (beyond-the-birthday-bound) CCA security claims. In this short note, we reestablish a birthday-bound CCA security bound for TNT. Furthermore, using a minor variant of Khairallah's attack, we show that our security bound is tight. We provide a rigorous and complete attack advantage calculations to further enhance the confidence in Khairallah's proposed attack strategy.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2023-08-24: last updated
- 2023-08-14: published
- Short URL
- https://ia.cr/2023/1233
- License
- https://creativecommons.org/licenses/by-nc-sa/4.0/
BibTeX
@misc{cryptoeprint:2023/1233,
author = {Ashwin Jha and Mridul Nandi and Abishanka Saha},
title = {Tight Security of TNT: Reinforcing Khairallah's Birthday-bound Attack},
howpublished = {Cryptology {ePrint} Archive, Paper 2023/1233},
year = {2023},
url = {https://eprint.iacr.org/2023/1233}
}