量子密钥分配
计算机科学
量子密码学
计算机安全
钥匙(锁)
理想(伦理)
加密
密钥分发
密码学
探测器
物理
黑客
量子
光子
电信
公钥密码术
量子信息
量子力学
认识论
哲学
作者
Yang Liu,Teng-Yun Chen,Liujun Wang,H. Liang,Guo-Liang Shentu,Jian Wang,Ke Cui,Hua‐Lei Yin,Nai-Le Liu,Li Li,Xiongfeng Ma,Jason S. Pelc,M. M. Fejer,Cheng-Zhi Peng,Qiang Zhang,Jian-Wei Pan
标识
DOI:10.1103/physrevlett.111.130502
摘要
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.
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