Global secure communication fit for space
Eavesdrop-proof communication is a matter of national interest, and quantum communication offers exactly this level of security. Over long distances, however, it is currently only feasible with ‘trusted intermediate nodes’ – a security compromise. At these nodes, the quantum state is measured and regenerated, creating a potential attack surface for eavesdropping techniques. The key component of a quantum repeater is the quantum memory. We are researching and developing this with the aim of realising a complete quantum repeater. This will enable the direct and unmeasured transmission of quantum states, allowing true end-to-end security over theoretically unlimited distances.
Our approach has been geared towards application from the outset: Our quantum memories and future quantum repeaters are designed to be suitable for use in space and, eventually, for microproduction. The resulting technology will be reproducible, industrially manufacturable and scalable – ready for practical use beyond the laboratory. When deployed in space, quantum repeaters are physically almost inaccessible, offering an additional level of security that would be extremely difficult for Earth-based solutions to achieve.
Development and production are to take place in Germany, designed for practical use. This will strengthen Europe’s technological sovereignty in a strategically critical area and open up new markets. The German armed forces and security services can benefit from secure communication, including over intercontinental distances. Our technology also opens up entirely new possibilities for the space industry. Authorities and operators of critical infrastructures – from energy supply to public administration – will also benefit from a communication infrastructure that remains secure even in an age of quantum computing.
Link:
German Aerospace Center (DLR)
Institute of Quantum Technologies
Email contact-dlr@DLR.de
Credit: ©DLR