Watch a conference talk from the 18th Theory of Quantum Computation, Communication and Cryptography (TQC 2023) exploring a novel device-independent quantum key distribution protocol that leverages synchronous correlations and Bell inequalities. Learn how this protocol improves upon existing device-independent schemes by establishing symmetry between users and eliminating the need for pre-shared randomness. Discover solutions to the "synchronicity" loophole through proof that almost synchronous correlations maintain self-testing properties, and understand a new security assumption addressing the "locality" loophole by demonstrating how adversaries with measurement basis uncertainty cannot maximally violate synchronous Bell inequalities. Delve into key concepts including device independence, nonlocal games, synchronous correlations, and the role of uncertainty in quantum cryptography through this technical presentation delivered at the University of Aveiro.