Quantum (Mar 2023)

Security of device-independent quantum key distribution protocols: a review

  • Ignatius W. Primaatmaja,
  • Koon Tong Goh,
  • Ernest Y.-Z. Tan,
  • John T.-F. Khoo,
  • Shouvik Ghorai,
  • Charles C.-W. Lim

DOI
https://doi.org/10.22331/q-2023-03-02-932
Journal volume & issue
Vol. 7
p. 932

Abstract

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Device-independent quantum key distribution (DI-QKD) is often seen as the ultimate key exchange protocol in terms of security, as it can be performed securely with uncharacterised black-box devices. The advent of DI-QKD closes several loopholes and side-channels that plague current QKD systems. While implementing DI-QKD protocols is technically challenging, there have been recent proof-of-principle demonstrations, resulting from the progress made in both theory and experiments. In this review, we will provide an introduction to DI-QKD, an overview of the related experiments performed, and the theory and techniques required to analyse its security. We conclude with an outlook on future DI-QKD research.