## CryptoDB

### Paper: Non-malleable Commitments Against Quantum Attacks

Authors: Nir Bitansky , TAU Huijia Lin , UW Omri Shmueli , TAU Search ePrint Search Google EUROCRYPT 2022 We construct, under standard hardness assumptions, the first non-malleable commitments secure against quantum attacks. Our commitments are statistically binding and satisfy the standard notion of {\em non-malleability with respect to commitment}. We obtain a $\log^\star(\lambda)$-round classical protocol, assuming the existence of post-quantum one-way functions. Previously, non-malleable commitments with quantum security were only known against a restricted class of adversaries known as {\em synchronizing adversaries.} At the heart of our results is a new general technique that allows to modularly obtain non-malleable commitments from any extractable commitment protocol, obliviously of the underlying extraction strategy (black-box or non-black-box) or round complexity. The transformation may also be of interest in the classical setting.
##### BibTeX
@inproceedings{eurocrypt-2022-31947,
title={Non-malleable Commitments Against Quantum Attacks},
publisher={Springer-Verlag},
author={Nir Bitansky and Huijia Lin and Omri Shmueli},
year=2022
}