Advantage Distillation for Device-Independent Quantum Key Distribution

Tan, Ernest Y.-Z.; Lim, Charles; Renner, Renato

doi:10.1103/physrevlett.124.020502

Cited by 54 publications

(59 citation statements)

References 47 publications

(82 reference statements)

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“…It has been observed in device-dependent QKD that two-way error-correcting protocols surpass the threshold of the one-way error-correcting protocol [BA07, WMUK07,KL17]. This question has only recently been explored in DI-QKD in [TLR19]. Therefore, it is possible that the upper bound via the intrinsic non-locality will not be tight for the existing DI-QKD protocols [ABG+07, AFDF+18] which consider only one-way error-correction.…”

Section: Q a X P Y Q B A X Y X A B Y 208mentioning

confidence: 99%

Fundamental limits on key rates in device-independent quantum key distribution

2020

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In this paper, we introduce intrinsic non-locality and quantum intrinsic non-locality as quantifiers for Bell non-locality, and we prove that they satisfy certain desirable properties such as faithfulness, convexity, and monotonicity under local operations and shared randomness. We then prove that intrinsic non-locality is an upper bound on the secret-key-agreement capacity of any deviceindependent protocol conducted using a device characterized by a correlation p, while quantum intrinsic non-locality is an upper bound on the same capacity for a correlation arising from an underlying quantum model. We also prove that intrinsic steerability is faithful, and it is an upper bound on the secret-key-agreement capacity of any one-sided-device-independent protocol conducted using a device characterized by an assemblager. Finally, we prove that quantum intrinsic non-locality is bounded from above by intrinsic steerability.

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Section: Q a X P Y Q B A X Y X A B Y 208mentioning

confidence: 99%

Fundamental limits on key rates in device-independent quantum key distribution

2020

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“…To improve the robustness of DIQKD, researchers have taken several approaches, from heralding-type solutions 19 – 21 , local precertification 22 , 23 , local Bell tests 24 , to two-way classical protocols 25 . However, none of these proposals are truly practical, for they are either more complex in implementation or provide only very little improvements in the channel parameters.…”

Section: Introductionmentioning

confidence: 99%

Device-independent quantum key distribution with random key basis

et al. 2021

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Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to distribute secret keys in an insecure network. It thus represents the ultimate form of cryptography, offering not only information-theoretic security against channel attacks, but also against attacks exploiting implementation loopholes. In recent years, much progress has been made towards realising the first DIQKD experiments, but current proposals are just out of reach of today’s loophole-free Bell experiments. Here, we significantly narrow the gap between the theory and practice of DIQKD with a simple variant of the original protocol based on the celebrated Clauser-Horne-Shimony-Holt (CHSH) Bell inequality. By using two randomly chosen key generating bases instead of one, we show that our protocol significantly improves over the original DIQKD protocol, enabling positive keys in the high noise regime for the first time. We also compute the finite-key security of the protocol for general attacks, showing that approximately 108–1010 measurement rounds are needed to achieve positive rates using state-of-the-art experimental parameters. Our proposed DIQKD protocol thus represents a highly promising path towards the first realisation of DIQKD in practice.

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“…It can be seen that, with a given e mis , the larger the N b , the larger the SKR. It indicates that, to satisfy the condition in (10), a larger N b should be selected.…”

Section: A Qkd Modeling and The Sdapp Approachmentioning

confidence: 99%

“…Quantum key distribution (QKD) provides a potent solution to securely distribute keys for two parties [10]. It uses fundamental laws of quantum mechanics instead of relying on mathematical assumptions.…”

Section: Introductionmentioning

confidence: 99%

Programmable Quantum Networked Microgrids

Tang

Zhang

Krawec

et al. 2020

IEEE Trans. Quantum Eng.

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Quantum key distribution (QKD) provides a potent solution to securely distribute keys for two parties. However, QKD itself is vulnerable to denial of service (DoS) attacks. A flexible and resilient QKD-enabled networked microgrids (NMs) architecture is needed but does not yet exist. In this article, we present a programmable quantum NMs (PQNMs) architecture. It is a novel framework that integrates both QKD and software-defined networking (SDN) techniques capable of enabling scalable, programmable, quantum-engineered, and ultra-resilient NMs. Equipped with a software-defined adaptive post-processing approach, a two-level key pool sharing strategy and an SDN-enabled event-triggered communication scheme, these PQNMs mitigate the impact of DoS attacks through programmable post-processing and secure key sharing among QKD links, a capability unattainable using existing technologies. Through comprehensive evaluations, we validate the benefits of PQNMs and demonstrate the efficacy of the presented strategies under various circumstances. Extensive results provide insightful resources for building QKD-enabled NMs in practice.INDEX TERMS Networked microgrids, quantum key distribution, software-defined networking.

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Advantage Distillation for Device-Independent Quantum Key Distribution

Cited by 54 publications

References 47 publications

Fundamental limits on key rates in device-independent quantum key distribution

Fundamental limits on key rates in device-independent quantum key distribution

Device-independent quantum key distribution with random key basis

Programmable Quantum Networked Microgrids

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