Practical Quantum Coin Flipping

Abstract

In this article we show for the first time that quantum coin flipping with security guarantees that are strictly better than any classical protocol is possible to implement with current technology. Our protocol takes into account all aspects of an experimental implementation like losses, multi-photon pulses emitted by practical photon sources, channel noise, detector dark counts and finite quantum efficiency. We calculate the abort probability when both players are honest, as well as the probability of one player forcing his desired outcome. For channel length up to 21 km, we achieve a cheating probability that is better than in any classical protocol. Our protocol is easy to implement using attenuated laser pulses, with no need for entangled photons or any other specific resources.

v2, 4 pages, 3 figures

References in corpus (4)

• Hacking commercial quantum cryptography systems by tailored bright illumination
• Fair Loss-Tolerant Quantum Coin Flipping
• An Entanglement-Based Protocol For Strong Coin Tossing With Bias 1/4
• A family of loss-tolerant quantum coin flipping protocols

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• On the possibility of classical client blind quantum computing
• Decoherence can help quantum cryptographic security
• Quantum cryptography beyond key distribution: theory and experiment
• Measurement-Device-Independent Quantum Coin Tossing
• Single-Photon Advantage in Quantum Cryptography Beyond QKD