Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantum Information (Quantum Communication and Quantum Repeater)
Q 47.2: Talk
Thursday, March 17, 2022, 10:45–11:00, Q-H12
Security analysis of encryption based on a quantum-provisioned root of trust — •Donika Imeri1,2 and Ralf Riedinger1,2 — 1Institut für Laserphysik und Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
Over the years, quantum key distribution paved the way for physically secured communication by generating a cryptographic key via a quantum channel. Due to the loss of quantum information in this channel, the distance between two directly communicating parties is constrained. Trusted-node and quantum repeater networks could overcome this challenge, requiring expensive infrastructure. Here, we present a protocol for quantum-secured key distribution based on an information-theoretically secure root of trust provisioned over a short quantum channel. Methods like over-the-air rekeying provide the system with security similar to conventional quantum key distribution even after disconnection from the quantum channel. As no physical quantum channel is needed in the communication phase, arbitrary distances can be realized and the use of mobile end-devices is possible. For further research, this protocol can be extended to network architectures, combining flexibility and scalability with secure communication.