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Title: Discrete and continuous variables for measurement-device-independent quantum cryptography

Abstract

In a recent Article in Nature Photonics, Pirandola et al.1 claim that the achievable secret key rates of discrete-variable (DV) measurementdevice- independent (MDI) quantum key distribution (QKD) (refs 2,3) are “typically very low, unsuitable for the demands of a metropolitan network” and introduce a continuous-variable (CV) MDI QKD protocol capable of providing key rates which, they claim, are “three orders of magnitude higher” than those of DV MDI QKD. We believe, however, that the claims regarding low key rates of DV MDI QKD made by Pirandola et al.1 are too pessimistic. Here in this paper, we show that the secret key rate of DV MDI QKD with commercially available high-efficiency single-photon detectors (SPDs) (for example, see http://www.photonspot.com/detectors and http://www.singlequantum.com) and good system alignment is typically rather high and thus highly suitable for not only long-distance communication but also metropolitan networks.

Authors:
 [1];  [2];  [3];  [4];  [5]
+ Show Author Affiliations
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Research Lab. of Electronics
  2. Univ. of Vigo, Vigo (Spain). Escuela de Ingenieria de Telecomunicacion, Dept. of Signal Theory and Communications
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computational Sciences and Engineering Division
  4. Univ. of Toronto, ON (Canada). Dept. of Electrical & Computer Engineering
  5. Univ. of Toronto, ON (Canada). Dept. of Electrical & Computer Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1327586
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nature Photonics
Additional Journal Information:
Journal Volume: 9; Journal Issue: 12; Journal ID: ISSN 1749-4885
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Quantum optics

Citation Formats

Xu, Feihu, Curty, Marcos, Qi, Bing, Qian, Li, and Lo, Hoi-Kwong. Discrete and continuous variables for measurement-device-independent quantum cryptography. United States: N. p., 2015. Web. doi:10.1038/nphoton.2015.206.
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Xu, Feihu, Curty, Marcos, Qi, Bing, Qian, Li, & Lo, Hoi-Kwong. Discrete and continuous variables for measurement-device-independent quantum cryptography. United States. https://doi.org/10.1038/nphoton.2015.206
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Xu, Feihu, Curty, Marcos, Qi, Bing, Qian, Li, and Lo, Hoi-Kwong. Mon . "Discrete and continuous variables for measurement-device-independent quantum cryptography". United States. https://doi.org/10.1038/nphoton.2015.206. https://www.osti.gov/servlets/purl/1327586.
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@article{osti_1327586,
title = {Discrete and continuous variables for measurement-device-independent quantum cryptography},
author = {Xu, Feihu and Curty, Marcos and Qi, Bing and Qian, Li and Lo, Hoi-Kwong},
abstractNote = {In a recent Article in Nature Photonics, Pirandola et al.1 claim that the achievable secret key rates of discrete-variable (DV) measurementdevice- independent (MDI) quantum key distribution (QKD) (refs 2,3) are “typically very low, unsuitable for the demands of a metropolitan network” and introduce a continuous-variable (CV) MDI QKD protocol capable of providing key rates which, they claim, are “three orders of magnitude higher” than those of DV MDI QKD. We believe, however, that the claims regarding low key rates of DV MDI QKD made by Pirandola et al.1 are too pessimistic. Here in this paper, we show that the secret key rate of DV MDI QKD with commercially available high-efficiency single-photon detectors (SPDs) (for example, see http://www.photonspot.com/detectors and http://www.singlequantum.com) and good system alignment is typically rather high and thus highly suitable for not only long-distance communication but also metropolitan networks.},
doi = {10.1038/nphoton.2015.206},
journal = {Nature Photonics},
number = 12,
volume = 9,
place = {United States},
year = {Mon Nov 16 00:00:00 EST 2015},
month = {Mon Nov 16 00:00:00 EST 2015}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1038/nphoton.2015.206
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Works referenced in this record:

High-rate measurement-device-independent quantum cryptography
journal, May 2015

  • Pirandola, Stefano; Ottaviani, Carlo; Spedalieri, Gaetana
  • Nature Photonics, Vol. 9, Issue 6
  • DOI: 10.1038/nphoton.2015.83

Measurement-Device-Independent Quantum Key Distribution
journal, March 2012

Side-Channel-Free Quantum Key Distribution
journal, March 2012

Fundamental rate-loss tradeoff for optical quantum key distribution
journal, October 2014

  • Takeoka, Masahiro; Guha, Saikat; Wilde, Mark M.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms6235

Experimental demonstration of long-distance continuous-variable quantum key distribution
journal, April 2013

  • Jouguet, Paul; Kunz-Jacques, Sébastien; Leverrier, Anthony
  • Nature Photonics, Vol. 7, Issue 5
  • DOI: 10.1038/nphoton.2013.63

Detecting single infrared photons with 93% system efficiency
journal, February 2013

Measurement-Device-Independent Quantum Key Distribution over 200 km
journal, November 2014

Composable Security Proof for Continuous-Variable Quantum Key Distribution with Coherent States
journal, February 2015

Finite-key analysis for measurement-device-independent quantum key distribution
journal, April 2014

  • Curty, Marcos; Xu, Feihu; Cui, Wei
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms4732
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    Works referencing / citing this record:

    Security analysis of passive measurement-device-independent continuous-variable quantum key distribution with almost no public communication
    journal, November 2019

    Practical challenges in quantum key distribution
    journal, November 2016

    • Diamanti, Eleni; Lo, Hoi-Kwong; Qi, Bing
    • npj Quantum Information, Vol. 2, Issue 1
    • DOI: 10.1038/npjqi.2016.25

    One Step Quantum Key Distribution Based on EPR Entanglement
    journal, June 2016

    • Li, Jian; Li, Na; Li, Lei-Lei
    • Scientific Reports, Vol. 6, Issue 1
    • DOI: 10.1038/srep28767

    Dual-phase-modulated plug-and-play measurement-device-independent continuous-variable quantum key distribution
    journal, January 2018

    Homodyne-detector-blinding attack in continuous-variable quantum key distribution
    text, January 2018

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