CryptoDB

Paper: Unconditionally Secure NIZK in the Fine-Grained Setting

Authors: Yuyu Wang , University of Electronic Science and Technology of China Jiaxin Pan , NTNU - Norwegian University of Science and Technology Search ePrint Search Google Slides ASIACRYPT 2022 Non-interactive zero-knowledge (NIZK) proof systems are often constructed based on cryptographic assumptions. In this paper, we propose the first unconditionally secure NIZK system in the AC0-fine-grained setting. More precisely, our NIZK system has perfect soundness for all adversaries and unconditional zero-knowledge for AC0 adversaries, namely, an AC0 adversary can only break the zero-knowledge property with negligible probability unconditionally. At the core of our construction is an OR-proof system for satisfiability of 1 out of polynomial many statements.
BibTeX
@inproceedings{asiacrypt-2022-32441,
title={Unconditionally Secure NIZK in the Fine-Grained Setting},
publisher={Springer-Verlag},
author={Yuyu Wang and Jiaxin Pan},
year=2022
}