Quantum key distribution in-field implementations : technology assessment of QKD deployments

This report briefly describes quantum key distribution field deployments worldwide. It updates the material presented in the JRC science for policy report EUR 29017 of 2017, and adds some technical details. Both terrestrial and satellite deployments are included, and both publicly funded and privately funded initiatives. The report forms part of a study to define a vision for a European quantum communications infrastructure, and its focus is on technology demonstrated in a relevant environment: theoretical work, laboratory-scale experimental research, and one-off, small-scale field pilots are therefore not covered.