Security Proof of QKD Protocols via Entropic Uncertainty Relations

Abstract

The field of Quantum Key Distribution (QKD) has attracted a lot of attention as one of the quantum technologies that not only addresses one of the most pressing problems in secret communication, but has also shown promising progress on the implementation side. A major advantage of QKD protocols is their provable security. This talk will introduce the concepts of entanglement-based QKD protocols and show a proof technique that uses entropic uncertainty relations as one of the main ingredients. Furthermore, I will show some results on how the use of Rényi entropies can increase the provably secure key rates.

References

• https://arxiv.org/abs/1103.4130
• https://arxiv.org/abs/1506.08458