Device-independent quantum key distribution from generalized CHSH inequalities

• URL: http://arxiv.org/abs/2009.01784v4
• Date: Fri, 16 Apr 2021 11:29:37 GMT
• Title: Device-independent quantum key distribution from generalized CHSH inequalities
• Abstract summary: Device-independent quantum key distribution aims at providing security guarantees even when using largely uncharacterised devices. We derive a security proof from a generalisation of the CHSH score, which effectively takes into account the individual values of two correlation functions.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Device-independent quantum key distribution aims at providing security guarantees even when using largely uncharacterised devices. In the simplest scenario, these guarantees are derived from the CHSH score, which is a simple linear combination of four correlation functions. We here derive a security proof from a generalisation of the CHSH score, which effectively takes into account the individual values of two correlation functions. We show that this additional information, which is anyway available in practice, allows one to get higher key rates than with the CHSH score. We discuss the potential advantage of this technique for realistic photonic implementations of device-independent quantum key distribution.

Related papers

• Computing key rates for one-sided device-independent quantum key distribution [1.6606976378426463]
  One-sided device-independent quantum key distribution sets an interesting middle ground between high key rates achievable by characterizing devices and the security of full device-independence.<n>We provide new tools, methods, and benchmarks for calculating key rates in this setting.
  arXiv  Detail & Related papers  (2026-08-26T15:28:47Z)
• Quantum Meets Statistical-Physical Secrecy: A Novel Hybrid Key Distribution Architecture [26.842576690061566]
  hybrid key distribution architecture jointly exploits quantum key distribution (QKD) and Kirchhoff-law-Johnson-noise (KLJN) statistical-physical key exchange.<n>Optical BB84-type QKD link operates in coordination with a parallel wired KLJN link.<n> Numerical results show that the proposed hybrid architecture can improve key generation efficiency and throughput in short-haul infrastructures.
  arXiv  Detail & Related papers  (2026-05-14T11:09:06Z)
• Security of decoy-state quantum key distribution with correlated bit-and-basis encoders [36.94429692322632]
  correlations break the round-by-round independence structure on which many widely used security proof techniques rely.<n>We develop a finite-key security proof for decoy-state BB84 against general coherent attacks.
  arXiv  Detail & Related papers  (2026-05-12T08:37:36Z)
• Certifying optimal device-independent quantum randomness in quantum networks [29.495895069435235]
  We present a family of multipartite Bell inequalities that allows to certify optimal quantum randomness and self-test GHZ states.<n>Compared with the Mermin-type inequalities, this family of Bell inequality is more efficient in certifying quantum randomness when non-maximal Bell values achieved.
  arXiv  Detail & Related papers  (2026-01-26T14:40:01Z)
• Optimizing Epsilon Security Parameters in QKD [41.99844472131922]
  We employ a continuous genetic algorithm (CGA) to optimize the epsilon-security components of two representative protocols.<n>We show substantial key rate improvements at high security levels, where the key rate typically vanishes.
  arXiv  Detail & Related papers  (2025-12-19T23:26:08Z)
• Analog Quantum Feature Selection with Neutral-Atom Quantum Processors [31.458406135473805]
  We present a quantum-native approach to quantum feature selection (QFS) based on analog quantum simulation with neutral atom arrays.<n>The protocol is evaluated through simulations on three benchmark binary classification datasets: Adult Income, Bank Marketing, and Telco Churn.<n>For compact subsets of 2-5 features, analog QFS improves mean AUC scores by 1.5-2.3% while reducing the number of features by 75-84%.
  arXiv  Detail & Related papers  (2025-10-23T17:57:34Z)
• Device Independent Quantum Key Activation [0.0]
  Device-independent quantum key distribution (DIQKD) allows two distant parties to establish a secret key.<n>We consider a scenario where several copies of a given quantum distribution are jointly processed via a local and classical wiring operation.<n>We find that, under few assumptions, it is possible to activate device-independent key.
  arXiv  Detail & Related papers  (2025-06-11T14:10:46Z)
• Device-independent secure correlations in sequential quantum scenarios [44.99833362998488]
  Device-independent quantum information is attracting significant attention, particularly for its applications in information security. We propose a systematic approach to designing sequential quantum protocols for device-independent security. We analytically prove that, with this systematic construction, the resulting ideal correlations are secure in the sense that they cannot be reproduced as a statistical mixture of other correlations.
  arXiv  Detail & Related papers  (2025-03-18T16:45:20Z)
• Efficient source-independent quantum conference key agreement [25.617190829449893]
  Quantum conference key agreement (QCKA) enables the unconditional secure distribution of conference keys among multiple participants. We propose a source-independent QCKA scheme utilizing the post-matching method. We introduce an equivalent distributing virtual multi-photon entanglement protocol for providing the unconditional security proof.
  arXiv  Detail & Related papers  (2024-06-25T04:24:06Z)
• Control landscapes for high-fidelity generation of C-NOT and C-PHASE gates with coherent and environmental driving [41.94295877935867]
  We consider the problem of high fidelity generation of two-qubit C-NOT and C-PHASE (with a detailed study of C-Z) gates in presence of the environment. We study quantum control landscapes which describe the behaviour of the fidelity as a function of the controls.
  arXiv  Detail & Related papers  (2024-05-23T00:04:19Z)
• Side-channel-secure quantum key distribution [0.9749560288448115]
  We present a side-channel-secure (SCS) quantum key distribution (QKD) under fully realistic conditions. Our result is not only measurement-device independent but also effective with imperfect (and unstable) source devices. We also present an improved method for SCS protocols which can raise the key rate by 1-2 orders of magnitude.
  arXiv  Detail & Related papers  (2023-05-14T13:00:34Z)
• Phase-Matching Quantum Key Distribution without Intensity Modulation [25.004151934190965]
  We propose a phase-matching quantum key distribution protocol without intensity modulation. Simulation results show that the transmission distance of our protocol could reach 305 km in telecommunication fiber. Our protocol provides a promising solution for constructing quantum networks.
  arXiv  Detail & Related papers  (2023-03-21T04:32:01Z)
• Conference key agreement in a quantum network [67.410870290301]
  Quantum conference key agreement (QCKA) allows multiple users to establish a secure key from a shared multi-partite entangled state. In a quantum network, this protocol can be efficiently implemented using a single copy of a N-qubit Greenberger-Horne-Zeilinger (GHZ) state to distil a secure N-user conference key bit.
  arXiv  Detail & Related papers  (2022-07-04T18:00:07Z)
• Upper bounds on key rates in device-independent quantum key distribution based on convex-combination attacks [1.118478900782898]
  We present the convex-combination attack as an efficient, easy-to-use technique for upper-bounding DIQKD key rates. It allows verifying the accuracy of lower bounds on key rates for state-of-the-art protocols.
  arXiv  Detail & Related papers  (2022-06-13T15:27:48Z)
• 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)
• The Skellam Mechanism for Differentially Private Federated Learning [28.623090760737075]
  We introduce the multi-dimensional Skellam mechanism, a discrete differential privacy mechanism based on the difference of two independent Poisson random variables. We analyze the privacy loss distribution via a numerical evaluation and provide a sharp bound on the R'enyi divergence between two shifted Skellam distributions. While useful in both centralized and distributed privacy applications, we investigate how it can be applied in the context of federated learning.
  arXiv  Detail & Related papers  (2021-10-11T04:28:11Z)
• Upper bounds on device-independent quantum key distribution rates in static and dynamic scenarios [3.3399953831968334]
  We develop upper bounds for key rates for device-independent quantum key distribution (DI-QKD) protocols and devices. We show that the convex hull of the currently known bounds is a tighter upper bound on the device-independent key rates of standard CHSH-based protocol. We show that the device-independent private capacity for the CHSH based protocols on depolarizing and erasure channels is limited by the secret key capacity of dephasing channels.
  arXiv  Detail & Related papers  (2021-07-13T22:01:09Z)
• Composably secure data processing for Gaussian-modulated continuous variable quantum key distribution [58.720142291102135]
  Continuous-variable quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties. We consider a protocol with homodyne detection in the general setting of composable finite-size security. In particular, we analyze the high signal-to-noise regime which requires the use of high-rate (non-binary) low-density parity check codes.
  arXiv  Detail & Related papers  (2021-03-30T18:02:55Z)
• A coherence-witnessing game and applications to semi-device-independent quantum key distribution [1.024113475677323]
  We introduce a coherence-based, semi-device-independent, semi-quantum key distribution protocol built upon a noise-robust version of a coherence equality game. Security is proven in the bounded quantum storage model, requiring users to implement only classical operations.
  arXiv  Detail & Related papers  (2021-03-11T17:55:34Z)
• Tight finite-key analysis for generalized high-dimensional quantum key distribution [23.578892457164933]
  We propose a tight finite-key analysis suitable for generalized high-dimensional quantum key distribution protocols. Benefitting from our theory, high-dimensional quantum key distribution protocols with finite resources become experimentally feasible.
  arXiv  Detail & Related papers  (2020-08-08T12:33:53Z)
• Efficient decoy-states for the reference-frame-independent measurement-device-independent quantum key distribution [22.452971995801686]
  RFI-MDI-QKD eliminates all possible attacks on detector side and necessity of reference-frame alignment in source sides. The performance of RFI-MDI-QKD is greatly improved in terms of secret key rate and achievable distance when statistical fluctuations are considered.
  arXiv  Detail & Related papers  (2020-02-10T11:52:53Z)

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.