Receiver-Device-Independent Quantum Key Distribution
Author:
Ioannou Marie1, Pereira Maria Ana1, Rusca Davide1, Grünenfelder Fadri1, Boaron Alberto1, Perrenoud Matthieu1, Abbott Alastair A.12, Sekatski Pavel1, Bancal Jean-Daniel13, Maring Nicolas1, Zbinden Hugo1, Brunner Nicolas1
Affiliation:
1. Department of Applied Physics University of Geneva, 1211 Geneva, Switzerland 2. Univ. Grenoble Alpes, Inria, 38000 Grenoble, France 3. Université Paris-Saclay, CEA, CNRS, Institut de physique théorique, 91191, Gif-sur-Yvette, France
Abstract
We present protocols for quantum key distribution in a prepare-and-measure setup with an asymmetric level of trust. While the device of the sender (Alice) is partially characterized, the receiver's (Bob's) device is treated as a black-box. The security of the protocols is based on the assumption that Alice's prepared states have limited overlaps, but no explicit bound on the Hilbert space dimension is required. The protocols are immune to attacks on the receiver's device, such as blinding attacks. The users can establish a secret key while continuously monitoring the correct functioning of their devices through observed statistics. We report a proof-of-principle demonstration, involving mostly off-the-shelf equipment, as well as a high-efficiency superconducting nanowire detector. A positive key rate is demonstrated over a 4.8 km low-loss optical fiber with finite-key analysis. The prospects of implementing these protocols over longer distances is discussed.
Funder
Swiss National Science Foundation
Publisher
Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
Subject
Physics and Astronomy (miscellaneous),Atomic and Molecular Physics, and Optics
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