Speaker
Description
Quantum key distribution (QKD) uses quantum mechanics to promise information-theoretic security between remote parties. It has received worldwide attention as a candidate protocol for next-generation secure communications, and it paves the way for large-scale quantum networks. However, practical components in the sender/receiver of a QKD system can still contain loopholes. Ensuring the implementation security of QKD is, as of today, still a major challenge in the field. In this talk, I will introduce two of our main contributions to the field in addressing this challenge: (1) asymmetric Measurement-Device-Independent (MDI) and Twin-Field (TF) QKD protocols, which close loopholes from the receiver’s detectors while also enabling high-performance and scalable quantum networks unrestrained by user location, as well as (2) fully passive QKD protocols, which remove loopholes from the sender's modulators, and they can further be combined with MDI-QKD/TF-QKD to simultaneously protect the sender and the receiver and enable more secure quantum networks. The above two new families of protocols represent a huge step toward building more implementation-secure QKD systems and future quantum networks with high performance and robustness.
| Keyword-1 | QKD |
|---|---|
| Keyword-2 | quantum cryptography |