Advances in device-independent quantum key distribution

• URL: http://arxiv.org/abs/2208.12842v1
• Date: Fri, 26 Aug 2022 18:55:40 GMT
• Title: Advances in device-independent quantum key distribution
• Authors: V\'ictor Zapatero, Tim van Leent, Rotem Arnon-Friedman, Wen-Zhao Liu, Qiang Zhang, Harald Weinfurter, and Marcos Curty
• Abstract summary: Device-independent quantum key distribution (DI-QKD) provides the gold standard for secure key exchange. Recent theoretical and experimental efforts have led to the first proof-of-principle DI-QKD implementations.
• Score: 8.155166479336625
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Device-independent quantum key distribution (DI-QKD) provides the gold standard for secure key exchange. Not only it allows for information-theoretic security based on quantum mechanics, but it relaxes the need to physically model the devices, hence fundamentally ruling out many quantum hacking threats to which non-DI QKD systems are vulnerable. In practice though, DI-QKD is very challenging. It relies on the loophole-free violation of a Bell inequality, a task that requires high quality entanglement to be distributed between distant parties and close to perfect quantum measurements, which is hardly achievable with current technology. Notwithstanding, recent theoretical and experimental efforts have led to the first proof-of-principle DI-QKD implementations. In this article, we review the state-of-the-art of DI-QKD by highlighting its main theoretical and experimental achievements, discussing the recent proof-of-principle demonstrations, and emphasizing the existing challenges in the field.

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