Quantum key distribution with correlated sources

• URL: http://arxiv.org/abs/1908.08261v5
• Date: Tue, 28 Mar 2023 02:55:31 GMT
• Title: Quantum key distribution with correlated sources
• Authors: Margarida Pereira, Go Kato, Akihiro Mizutani, Marcos Curty, Kiyoshi Tamaki
• Abstract summary: In theory, quantum key distribution (QKD) offers information-theoretic security. In practice, however, it does not due to discrepancies between the assumptions used in the security proofs and the behaviour of the real apparatuses. Here, we close this gap by introducing a simple yet general method to prove the security of QKD with arbitrarily long-range pulse correlations.
• Score: 1.7499351967216341
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In theory, quantum key distribution (QKD) offers information-theoretic security. In practice, however, it does not due to the discrepancies between the assumptions used in the security proofs and the behaviour of the real apparatuses. Recent years have witnessed a tremendous effort to fill the gap, but the treatment of correlations among pulses has remained a major elusive problem. Here, we close this gap by introducing a simple yet general method to prove the security of QKD with arbitrarily long-range pulse correlations. Our method is compatible with those security proofs that accommodate all the other typical device imperfections, thus paving the way towards achieving implementation security in QKD with arbitrary flawed devices. Moreover, we introduce a new framework for security proofs, which we call the reference technique. This framework includes existing security proofs as special cases and it can be widely applied to a number of QKD protocols.

Related papers

• High-Fidelity Coherent-One-Way QKD Simulation Framework for 6G Networks: Bridging Theory and Reality [105.73011353120471]
  Quantum key distribution (QKD) has been emerged as a promising solution for guaranteeing information-theoretic security. Due to the considerable high-cost of QKD equipment, a lack of QKD communication system design tools is challenging. This paper introduces a QKD communication system design tool.
  arXiv  Detail & Related papers  (2025-01-21T11:03:59Z)
• Loss-tolerant quantum key distribution with detection efficiency mismatch [39.58317527488534]
  We establish a security proof for the loss-tolerant P&M QKD protocol that incorporates imperfections in both the source and the detectors. Specifically, we demonstrate the security of this scheme when the emitted states deviate from the ideal ones.
  arXiv  Detail & Related papers  (2024-12-12T19:01:56Z)
• Practical hybrid PQC-QKD protocols with enhanced security and performance [44.8840598334124]
  We develop hybrid protocols by which QKD and PQC inter-operate within a joint quantum-classical network. In particular, we consider different hybrid designs that may offer enhanced speed and/or security over the individual performance of either approach.
  arXiv  Detail & Related papers  (2024-11-02T00:02:01Z)
• Finite-Key Analysis for Coherent One-Way Quantum Key Distribution [18.15943439545963]
  Coherent-one-way (COW) quantum key distribution (QKD) is a significant communication protocol that has been implemented experimentally and deployed in practical products. Existing security analyses of COW-QKD either provide a short transmission distance or lack immunity against coherent attacks in the finite-key regime. We present a tight finite-key framework for a variant of COW-QKD, which has been proven to extend the secure transmission distance in the case.
  arXiv  Detail & Related papers  (2023-09-28T03:32:06Z)
• Practical quantum secure direct communication with squeezed states [55.41644538483948]
  We report the first table-top experimental demonstration of a CV-QSDC system and assess its security. This realization paves the way into future threat-less quantum metropolitan networks, compatible with coexisting advanced wavelength division multiplexing (WDM) systems.
  arXiv  Detail & Related papers  (2023-06-25T19:23:42Z)
• The Quantum Chernoff Divergence in Advantage Distillation for QKD and DIQKD [0.0]
  Device-independent quantum key distribution (DIQKD) aims to mitigate adversarial exploitation of imperfections in quantum devices. We present an alternative proof structure that replaces the fidelity with the quantum Chernoff divergence. Our results provide insight into a fundamental question in quantum information theory regarding the circumstances under which DIQKD is possible.
  arXiv  Detail & Related papers  (2022-12-14T01:44:23Z)
• FI-ODE: Certifiably Robust Forward Invariance in Neural ODEs [34.762005448725226]
  We propose a general framework for training and provably certifying robust forward invariance in Neural ODEs. We apply this framework to provide certified safety in robust continuous control. In addition, we explore the generality of our framework by using it to certify adversarial robustness for image classification.
  arXiv  Detail & Related papers  (2022-10-30T20:30:19Z)
• Improved coherent one-way quantum key distribution for high-loss channels [0.0]
  We present a simple variant of COW-QKD and prove its security in the infinite-key limit. Remarkably, the resulting key rate of our protocol is comparable with both the existing upper-bound on COW-QKD key rate and the secure key rate of the coherent-state BB84 protocol.
  arXiv  Detail & Related papers  (2022-06-17T00:07:03Z)
• Experimental measurement-device-independent type quantum key distribution with flawed and correlated sources [14.143874849657317]
  Security of quantum key distribution (QKD) is threatened by discrepancies between realistic devices and theoretical assumptions. Here, we adopt the reference technique to prove security of an efficient four-phase measurement-device-independent QKD using laser pulses against potential source imperfections. In addition, we demonstrate the feasibility of our protocol through a proof-of-principle experimental implementation and achieve a secure key rate of 253 bps with a 20 dB channel loss.
  arXiv  Detail & Related papers  (2022-04-18T13:44:51Z)
• Prospects for device-independent quantum key distribution [0.0]
  Device-independent quantum key distribution (DIQKD) aims to achieve secure key distribution with only minimal assumptions. We present security proofs for several techniques that help to improve the keyrates and noise tolerance of DIQKD.
  arXiv  Detail & Related papers  (2021-11-23T10:28:30Z)
• Backflash Light as a Security Vulnerability in Quantum Key Distribution Systems [77.34726150561087]
  We review the security vulnerabilities of quantum key distribution (QKD) systems. We mainly focus on a particular effect known as backflash light, which can be a source of eavesdropping attacks.
  arXiv  Detail & Related papers  (2020-03-23T18:23:12Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.