Choi, Yujun Kwon, Osung Woo, Minki Oh, Kyunghwan Han, Sang-Wook Kim, Yong-Su Moon, Sung 2024-01-20T04:33:48Z 2024-01-20T04:33:48Z 2021-09-05 2016-03-14 2469-9926 https://pubs.kist.re.kr/handle/201004/124286 Quantum key distribution (QKD) guarantees unconditional communication security based on the laws of quantum physics. However, practical QKD suffers from a number of quantum hackings due to the device imperfections. From the security standpoint, measurement-device-independent quantum key distribution (MDI-QKD) is in the limelight since it eliminates all the possible loopholes in detection. Due to active control units for mode matching between the photons from remote parties, however, the implementation of MDI-QKD is highly impractical. In this paper, we propose a method to resolve the mode matching problem while minimizing the use of active control units. By introducing the plug-and-play (P&P) concept into MDI-QKD, the indistinguishability in spectral and polarization modes between photons can naturally be guaranteed. We show the feasibility of P&P MDI-QKD with a proof-of-principle experiment. English American Physical Society CRYPTOGRAPHY SYSTEMS Plug-and-play measurement-device-independent quantum key distribution Article 10.1103/PhysRevA.93.032319 1 Physical Review A, v.93, no.3 Physical Review A 93 3 scie scopus 000372398300005 2-s2.0-84961838397 Optics Physics, Atomic, Molecular & Chemical Optics Physics Article CRYPTOGRAPHY SYSTEMS 양자암호 양자키분배 양자정보