Simple security proof of coherent-one-way quantum key distribution

  • Gao R
  • Xie Y
  • Gu J
  • et al.
13Citations
Citations of this article
13Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Coherent-one-way quantum key distribution (COW-QKD), which requires a simple experimental setup and has the ability to withstand photon-number-splitting attacks, has been not only experimentally implemented but also commercially applied. However, recent studies have shown that the current COW-QKD system is insecure and can only distribute secret keys safely within 20 km of the optical fiber length. In this study, we propose a practical implementation of COW-QKD by adding a two-pulse vacuum state as a new decoy sequence. This proposal maintains the original experimental setup as well as the simplicity of its implementation. Utilizing detailed observations on the monitoring line to provide an analytical upper bound on the phase error rate, we provide a high-performance COW-QKD asymptotically secure against coherent attacks. This ensures the availability of COW-QKD within 100 km and establishes theoretical foundations for further applications.

Cite

CITATION STYLE

APA

Gao, R.-Q., Xie, Y.-M., Gu, J., Liu, W.-B., Weng, C.-X., Li, B.-H., … Chen, Z.-B. (2022). Simple security proof of coherent-one-way quantum key distribution. Optics Express, 30(13), 23783. https://doi.org/10.1364/oe.461669

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free