2026-07-23T03:27:21Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:18318 2024-03-06T11:01:39Z ddc:004 open_access

Fully Device-Independent Quantum Key Distribution Using Synchronous Correlations Rodrigues, Nishant Lackey, Brad quantum cryptography device independence key distribution security proofs randomness We derive a device-independent quantum key distribution protocol based on synchronous correlations and their Bell inequalities. This protocol offers several advantages over other device-independent schemes including symmetry between the two users and no need for pre-shared randomness. We close a "synchronicity" loophole by showing that an almost synchronous correlation inherits the self-testing property of the associated synchronous correlation. We also pose a new security assumption that closes the "locality" (or "causality") loophole: an unbounded adversary with even a small uncertainty about the users' choice of measurement bases cannot produce any almost synchronous correlation that approximately maximally violates a synchronous Bell inequality. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Nishant Rodrigues and Brad Lackey 2023 Is Part Of LIPIcs, Volume 266, 18th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2023) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.TQC.2023.8 urn:nbn:de:0030-drops-183185 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.TQC.2023.8 eng https://creativecommons.org/licenses/by/4.0/legalcode