A communications network based on a quantum-secured IT infrastructure will provide enhanced protection against attacks and improve security for the networking of future quantum computers. Such a network relies on quantum repeaters, which store and transmit data over long distances. Coordinated by Saarland University, partners from both business and science are researching these special repeaters in the QR.N network project. Scientists from the University of Stuttgart are contributing their expertise in quantum physics, photonics, microoptics, and quantum computing to the consortium. The Federal Ministry of Education and Research (BMBF) is funding QR.N with approx. EUR 20 million.