Abstract
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 seminar, I will introduce two of my main contributions to the field in addressing this challenge: (1) proposing the asymmetric Measurement-Device-Independent (MDI) QKD protocol, which removes loopholes from the receiver’s detectors while also enabling high-rate and scalable quantum networks unrestrained by user location, as well as (2) proposing the fully passive QKD protocol, which removes loopholes from the sender’s modulators and can further be combined with MDI-QKD and its variants to simultaneously protect the sender and the receiver. The above two new proposals represent a huge step toward building more secure practical QKD systems and future quantum networks.
Anyone interested is welcome to attend.