Long-Range QKD without Trusted Nodes is Not Possible with Current Technology
Bruno Huttner, Romain All\'eaume, Eleni Diamanti, Florian Fr\"owis,, Philippe Grangier, Hannes H\"ubel, Vicente Martin, Andreas Poppe, Joshua A., Slater, Tim Spiller, Wolfgang Tittel, Benoit Tranier, Adrian Wonfor, Hugo, Zbinden
TL;DR
This paper critically analyzes a recent claim of a long-range quantum key distribution protocol that purportedly eliminates the need for trusted nodes and quantum repeaters, concluding the claim is largely unfounded with current technology.
Contribution
The paper provides a straightforward analysis demonstrating that the recent claim of long-range QKD without trusted nodes is not supported by current technological capabilities.
Findings
Claim of long-range QKD without trusted nodes is unfounded
Current technology cannot achieve long-range QKD without trusted nodes
The analysis challenges recent patent claims in quantum cryptography
Abstract
A recently published patent (https://www.ipo.gov.uk/p-ipsum/Case/PublicationNumber/GB2590064) has claimed the development of a novel quantum key distribution protocol purporting to achieve long-range quantum security without trusted nodes and without use of quantum repeaters. Here we present a straightforward analysis of this claim, and reach the conclusion that it is largely unfounded.
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