Results of the NATO project: “Analysis, design, and implementation of an end-to-end QKD link”

M. Mondin, F. Daneshgaran, S. Arnon, M. Genovese, I. Bari, O. Khan, F. Di Stasio, J. Kupferman, A. Meda, I. P. Degiovanni, M. Gramegna, F. Saccomandi, M. M. Khan, N. Ullah, K. Olia, J. May, J. Neilson

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This manuscript discusses the most relevant aspects of the practical implementation of a long-range Quantum Key Distribution (QKD) link with trusted nodes, achieving the highest possible secret key rate generation within the security and system-level constraints. We describe the implementation of an end-to-end QKD system, including implementation aspects from the physical transmission of photon states through a standard telecommunications-grade optical fiber. In addition, quantum metrology and information reconciliation protocols based on forward error correction codes are considered. In the circumstances that fiber optical link may not be available, we examine the problems involved with the implementation of a Free Space Optics (FSO) QKD link. The manuscript also discusses the problem of information reconciliation in Continuous Variable (CV) QKD scenarios on FSO links, showing that in long-distance links, since the sign of the received Gaussian samples contains the largest fraction of information, Unequal Error Protection (UEP) reverse reconciliation schemes can be designed. The presented results have been achieved within the NATO SPS project “Analysis, design and implementation of an end-to-end 400 km QKD link”.

Original languageEnglish
Title of host publicationQuantum Communications and Quantum Imaging XIX
EditorsKeith S. Deacon, Ronald E. Meyers
ISBN (Electronic)9781510645080
StatePublished - 1 Jan 2021
EventQuantum Communications and Quantum Imaging XIX 2021 - San Diego, United States
Duration: 1 Aug 20215 Aug 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceQuantum Communications and Quantum Imaging XIX 2021
Country/TerritoryUnited States
CitySan Diego


  • CV-QKD
  • Free space optics QKD
  • Information reconciliation
  • Quantum key distribution

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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