Quantum Key Distribution with Basis-Dependent Detection Probability

• URL: http://arxiv.org/abs/2411.19874v1
• Date: Fri, 29 Nov 2024 17:35:27 GMT
• Title: Quantum Key Distribution with Basis-Dependent Detection Probability
• Authors: Federico Grasselli, Giovanni Chesi, Nathan Walk, Hermann Kampermann, Adam Widomski, Maciej Ogrodnik, Michał Karpiński, Chiara Macchiavello, Dagmar Bruß, Nikolai Wyderka,
• Abstract summary: A common assumption in security proofs is that the detection probability at the receiver, for a given input state, is independent of the measurement basis. This paper presents a security proof for QKD protocols that does not rely on the above assumption. We demonstrate, through simulations, that our proof can extract positive key rates for setups vulnerable to large detection probability mismatches.
• Score: 0.0
• License:
• Abstract: Quantum Key Distribution (QKD) is a promising technology for secure communication. Nevertheless, QKD is still treated with caution in certain contexts due to potential gaps between theoretical models and actual QKD implementations. A common assumption in security proofs is that the detection probability at the receiver, for a given input state, is independent of the measurement basis, which might not always be verified and could lead to security loopholes. This paper presents a security proof for QKD protocols that does not rely on the above assumption and is thus applicable in scenarios with detection probability mismatches, even when induced by the adversary. We demonstrate, through simulations, that our proof can extract positive key rates for setups vulnerable to large detection probability mismatches. This is achieved by monitoring whether an adversary is actively exploiting such vulnerabilities, instead of considering the worst-case scenario as in previous proofs. Our work highlights the importance of accounting for basis-dependent detection probabilities and provides a concrete solution for improving the security of practical QKD systems.

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)
• 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)
• Robust and efficient verification of graph states in blind measurement-based quantum computation [52.70359447203418]
  Blind quantum computation (BQC) is a secure quantum computation method that protects the privacy of clients. It is crucial to verify whether the resource graph states are accurately prepared in the adversarial scenario. Here, we propose a robust and efficient protocol for verifying arbitrary graph states with any prime local dimension.
  arXiv  Detail & Related papers  (2023-05-18T06:24:45Z)
• A security framework for quantum key distribution implementations [1.2815904071470707]
  We present a security proof in the finite-key regime against coherent attacks. Our proof requires minimal state characterization, which facilitates its application to real-life implementations.
  arXiv  Detail & Related papers  (2023-05-10T07:02:32Z)
• 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)
• Distribution-free uncertainty quantification for classification under label shift [105.27463615756733]
  We focus on uncertainty quantification (UQ) for classification problems via two avenues. We first argue that label shift hurts UQ, by showing degradation in coverage and calibration. We examine these techniques theoretically in a distribution-free framework and demonstrate their excellent practical performance.
  arXiv  Detail & Related papers  (2021-03-04T20:51:03Z)
• Trust but Verify: Assigning Prediction Credibility by Counterfactual Constrained Learning [123.3472310767721]
  Prediction credibility measures are fundamental in statistics and machine learning. These measures should account for the wide variety of models used in practice. The framework developed in this work expresses the credibility as a risk-fit trade-off.
  arXiv  Detail & Related papers  (2020-11-24T19:52:38Z)
• Certifiably Adversarially Robust Detection of Out-of-Distribution Data [111.67388500330273]
  We aim for certifiable worst case guarantees for OOD detection by enforcing low confidence at the OOD point. We show that non-trivial bounds on the confidence for OOD data generalizing beyond the OOD dataset seen at training time are possible.
  arXiv  Detail & Related papers  (2020-07-16T17:16:47Z)
• Security of quantum key distribution with detection-efficiency mismatch in the multiphoton case [0.0]
  Current security of QKD with detection-efficiency mismatch rely on the assumption of the single-photon light source on the sender side or on the assumption of the single-photon input of the receiver side. Here we present a rigorous security proof without these assumptions and, thus, solve this important problem and prove the security of QKD with detection-efficiency mismatch against general attacks.
  arXiv  Detail & Related papers  (2020-04-16T17:55:30Z)
• Quantum key distribution with correlated sources [1.7499351967216341]
  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.
  arXiv  Detail & Related papers  (2019-08-22T09:05:17Z)

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.