Woo, Min Ki Park, Byung Kwon Kim, Yong-Su Cho, Young-Wook Jung, Hojoong Lim, Hyang-Tag Kim, Sangin Moon, Sung Han, Sang-Wook 2024-01-19T16:31:56Z 2024-01-19T16:31:56Z 2021-09-04 2020-10 2169-3536 https://pubs.kist.re.kr/handle/201004/118029 The quantum key distribution (QKD) research, which is drawing attention as the next secure communication, is actively expanding from point to point system to network architecture. In QKD network system, it is important to increase the number of users who can securely communicate. Up to date, a wavelength division multiplexing (WDM) architecture has successfully expanded the number of channels without significant system loss, but there is a limitation of increasing channels considering the range of telecommunication wavelength and crosstalk noise, etc. In this article, we propose a polarizing division method that increases user channels independently of wavelengths. The proposed architecture can increase the number of wavelength multiplexed channels by a multiple of the polarization number. We identify the issues in the QKD network system that may occur when using polarization and wavelengths simultaneously, then provide solutions and optimize the system operation accordingly. Finally, we describe a field test result of a one to many QKD network system that shows successful key exchange with 3% QBER. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC QUANTUM CRYPTOGRAPHY KEY DISTRIBUTION HACKING One to Many QKD Network System Using Polarization-Wavelength Division Multiplexing Article 10.1109/ACCESS.2020.3032992 1 IEEE ACCESS, v.8, pp.194007 - 194014 IEEE ACCESS 8 194007 194014 scie scopus 000587842200001 2-s2.0-85102845408 Computer Science, Information Systems Engineering, Electrical & Electronic Telecommunications Computer Science Engineering Telecommunications Article QUANTUM CRYPTOGRAPHY KEY DISTRIBUTION HACKING Wavelength division multiplexing Avalanche photodiodes Cryptography Optical fiber networks Arrayed waveguide gratings Servers Optical interferometry Quantum cryptography quantum key distribution network polarization division multiplexing