Funding organization: Federal Ministry of Education and Research (BMBF)

https://www.forschung-it-sicherheit-kommunikationssysteme.de/projekte/q-link.x (German)

Digital transformation has from industry 4.0 to healthcare applications impacts on our society. Therefore it is the more important to ensure data security as well as reliable and secure communication. By using fundamental laws of quantum physics, it is possible to encrypt transmitted information in such a way nobody can read them unnoticeably.

However, this technology caused considerable transmission losses so far, whereby the transmission distances are limited to less than 100 kilometers. The Fraunhofer Heinrich Hertz Institute and
23 other partners from research and industry are developing a solution for that problem within the scope of the project "Quanten-Link-Erweiterung" (Q.Link.X). A promising result of the project is a functional quantum repeater, which links the signals of the sections to enable larger transmission distances.