User-independent optical path length compensation scheme with sub-ns timing resolution for 1xN quantum key distribution network system

• URL: http://arxiv.org/abs/2001.00757v1
• Date: Fri, 3 Jan 2020 08:16:57 GMT
• Title: User-independent optical path length compensation scheme with sub-ns timing resolution for 1xN quantum key distribution network system
• Authors: Byung Kwon Park, Min Ki Woo, Yong-Su Kim, Young-Wook Cho, Sung Moon, and Sang-Wook Han
• Abstract summary: Quantum key distribution (QKD) networks constitute promising solutions for secure communication. We developed 1xN QKD network systems with a sub-ns resolution optical path length compensation scheme. We demonstrated the working of a 1x4 QKD network system using the fiber network of a metropolitan area.
• Score: 1.2314765641075438
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum key distribution (QKD) networks constitute promising solutions for secure communication. Beyond conventional point-to-point QKD, we developed 1xN QKD network systems with a sub-ns resolution optical path length compensation scheme. With a practical plug-and-play QKD architecture and compact timing control modules based on a field programmable gate array (FPGA), we achieved long term stable operation of a 1x64 QKD network system. Using this architecture, 64 users can simultaneously share secret keys with one server, without using complex software algorithms and expensive hardware. We demonstrated the working of a 1x4 QKD network system using the fiber network of a metropolitan area.

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