论文标题
Quantum密钥分布的无噪声攻击和反事实安全性
Noiseless attack and counterfactual security of quantum key distribution
论文作者
论文摘要
反事实量子键分布（QKD）使两方可以使用无互动测量来共享一个秘密密钥。在这里，我们指出，可以通过包括非相互作用的位来提高反事实QKD协议的效率。这种包容性可能引起了无噪声攻击的可能性，在这种情况下，夏娃可以在量子通道中引入任何错误的情况下获得关键位的知识。我们展示了如何以一种简单的方式解决此问题，从而自然会导致“反事实安全性”的概念，从而通过反事实检测来表明非相关键位被指示为安全。这种提高关键率的方法被证明适用于各种现有的量子反事实键分配协议，从而提高了效率而不削弱其安全性。
Counterfactual quantum key distribution (QKD) enables two parties to share a secret key using an interaction-free measurement. Here, we point out that the efficiency of counterfactual QKD protocols can be enhanced by including non-counterfactual bits. This inclusion potentially gives rise to the possibility of noiseless attacks, in which Eve can gain knowledge of the key bits without introducing any errors in the quantum channel. We show how this problem can be resolved in a simple way that naturally leads to the idea of "counterfactual security", whereby the non-counterfactual key bits are indicated to be secure by counterfactual detections. This method of enhancing the key rate is shown to be applicable to various existing quantum counterfactual key distribution protocols, increasing their efficiency without weakening their security.
