Noisy pre-processing facilitating a photonic realisation of device-independent quantum key distribution

Abstract

Device-independent quantum key distribution provides security even when the equipment used to communicate over the quantum channel is largely uncharacterized. An experimental demonstration of device-independent quantum key distribution is however challenging. A central obstacle in photonic implementations is that the global detection efficiency, i.e., the probability that the signals sent over the quantum channel are successfully received, must be above a certain threshold. We here propose a method to significantly relax this threshold, while maintaining provable device-independent security. This is achieved with a protocol that adds artificial noise, which cannot be known or controlled by an adversary, to the initial measurement data (the raw key). Focusing on a realistic photonic setup using a source based on spontaneous parametric down conversion, we give explicit bounds on the minimal required global detection efficiency.

5+16 pages, 4 figures

References in corpus (7)

• Secure Quantum Key Distribution
• Hacking commercial quantum cryptography systems by tailored bright illumination
• Distillation of secret key and entanglement from quantum states
• Device-independent quantum key distribution secure against collective attacks
• Quantum Eavesdropping without Interception: An Attack Exploiting the Dead Time of Single Photon Detectors
• Noisy Preprocessing and the Distillation of Private States
• Challenging preconceptions about Bell tests with photon pairs

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