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25 April 2024

» arxiv » 1209.6178

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Experimental measurement-device-independent quantum key distribution
Yang Liu ; Teng-Yun Chen ; Liu-Jun Wang ; Hao Liang ; Guo-Liang Shentu ; Jian Wang ; Ke Cui ; Hua-Lei Yin ; Nai-Le Liu ; Li Li ; Xiongfeng Ma ; Jason S. Pelc ; M. M. Fejer ; Qiang Zhang ; Jian-Wei Pan ;
Date:	27 Sep 2012
Abstract:	Throughout history, every advance in encryption has been defeated by advances in hacking with severe consequences. Quantum cryptography holds the promise to end this battle by offering unconditional security when ideal single-photon sources and detectors are employed. Unfortunately, ideal devices never exist in practice and device imperfections have become the targets of various attacks. By developing up-conversion single-photon detectors with high efficiency and low noise, we build up a measurement-device-independent quantum key distribution (MDI-QKD) system, which is immune to all hacking strategies on detection. Meanwhile, we employ the decoy-state method to defeat attacks on non-ideal source. By closing the loopholes in both source and detection, our practical system, which generates more than 25 kbit secure key over a 50-km fiber link, provides an ultimate solution for communication security.
Source:	arXiv, 1209.6178
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