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Non-malleable Commitments Against Quantum Attacks

Nir Bitansky, Huijia Lin, Omri Shmueli

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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 non-malleability with respect to commitment. We obtain a log (λ) -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 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.

Original languageEnglish
Title of host publicationAdvances in Cryptology – EUROCRYPT 2022 - 41st Annual International Conference on the Theory and Applications of Cryptographic Techniques, 2022, Proceedings
EditorsOrr Dunkelman, Stefan Dziembowski
PublisherSpringer Science and Business Media Deutschland GmbH
Pages519-550
Number of pages32
ISBN (Print)9783031070815
DOIs
StatePublished - 2022
Event41st Annual International Conference on the Theory and Applications of Cryptographic Techniques, EUROCRYPT 2022 - Trondheim, Norway
Duration: 30 May 20223 Jun 2022

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume13277 LNCS

Conference

Conference41st Annual International Conference on the Theory and Applications of Cryptographic Techniques, EUROCRYPT 2022
Country/TerritoryNorway
CityTrondheim
Period30/05/223/06/22

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • General Computer Science

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