<p>➀ The Fraunhofer Heinrich-Hertz-Institut (HHI) has initiated the QR.N project to develop interconnected quantum repeaters for secure end-to-end communication networks.</p><p>➁ The project is funded by the German Federal Ministry of Education and Research and is set to run from January 2025 to December 2027.</p><p>➂ Quantum networks ensure secure data transmission through the principles of quantum mechanics, particularly quantum entanglement, making any tampering or query of quantum states immediately detectable.</p>