Welcome to the resource topic for 2023/1280
Title:
Quantum Security of TNT
Authors: Shuping Mao, Zhiyu Zhang, Lei Hu, Luying Li, Peng Wang
Abstract:With the development of quantum attacks, many classical-secure structures are not secure in quantum. How to evaluate the quantum security of structure and give a tight security bound becomes a challenging research topic. As a tweakable block cipher structure based on block ciphers, \mathsf{TNT} was proven to be of classical beyond-birthday-bound O(2^{3n/4}) security. We prove that \mathsf{TNT} is a quantum-secure tweakable block cipher with a bound of O(2^{n/6}). In addition, we show the tight quantum PRF security bound of O(2^{n/3}) when \mathsf{TNT} is based on random functions, which is better than O(2^{n/4}) given by Bhaumik et al. and solves their open problem. Our proof uses the recording standard oracle with errors technique of Hosoyamada and Iwata based on Zhandry’s compressed oracle technique.
ePrint: https://eprint.iacr.org/2023/1280
See all topics related to this paper.
Feel free to post resources that are related to this paper below.
Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.
For more information, see the rules for Resource Topics .