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Quantum hacking: Experimental demonstration of time-shift attackagainst practical quantum-key-distribution systems

机译:量子黑客:针对实际量子密钥分发系统的时移攻击的实验演示

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摘要

Quantum-key-distribution (QKD) systems can send quantum signals over more than 100 km standard opti-cal fiber and are widely believed to be secure. Here, we show experimentally a technologically feasible attack—namely, the time-shift attack—against a commercial QKD system. Our result shows that, contrary to popular belief, an eavesdropper, Eve, has a non-negligible probability (-4%) to break the security of the system. Eve's success is due to the well-known detection efficiency loophole in the experimental testing of Bell's inequalities. Therefore, the detection efficiency loophole plays a key role not only in fundamental physics, but also in technological applications such as QKD systems.
机译:量子密钥分配(QKD)系统可以在超过100 km的标准光纤上发送量子信号,并且被广泛认为是安全的。在这里,我们通过实验展示了针对商业QKD系统的技术上可行的攻击,即时移攻击。我们的结果表明,与流行的看法相反,窃听者Eve破坏系统安全性的可能性不可忽略(-4%)。夏娃的成功归因于贝尔不等式实验测试中众所周知的检测效率漏洞。因此,检测效率漏洞不仅在基础物理学中而且在诸如QKD系统的技术应用中都起着关键作用。

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