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Proceedings Paper

The secure transmission criterion of practical polarization coding QKD systems under PNS attacks
Author(s): Yan Chen; Hongyu Yang; Ke Deng; Zhoushi Yao
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Paper Abstract

After over twenty years since the demonstration of the first QKD systems in 1989 there have been two categories of QKD systems, namely fiber QKD systems and wireless QKD systems. The security of a practical QKD system over wireless optical paths is degraded due to imperfectness of devices and channel loss. Very simple attacks, such as beamsplitting attacks (BS), could jeopardize the security of polarization coding QKD systems. Among all the attacks photon number splitting (PNS) is the most threatening one against the security of polarization coding QKD systems. The upper bound for secure transmission length of free-space QKD systems based on polarization coding under PNS attacks is provided here as well as the secure transmission criterion. The theoretic results predicted in this paper accord with experimental results of Manderbach's work.

Paper Details

Date Published: 19 November 2008
PDF: 8 pages
Proc. SPIE 7137, Network Architectures, Management, and Applications VI, 71372Z (19 November 2008); doi: 10.1117/12.802703
Show Author Affiliations
Yan Chen, Univ. of Electronic Science and Technology of China (China)
Hongyu Yang, Univ. of Electronic Science and Technology of China (China)
Ke Deng, Univ. of Electronic Science and Technology of China (China)
Zhoushi Yao, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7137:
Network Architectures, Management, and Applications VI
Weisheng Hu; Shoa-Kai Liu; Ken-ichi Sato; Lena Wosinska, Editor(s)

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