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理论物理通讯：英文版

Counterfactual Quantum Deterministic Key Distribution

张盛, 王剑, 唐朝京

Published Jan 15, 2013• 0 citations
OpenAlex

Abstract

我们建议一个新 counterfactual 量密码学协议有关关于散布一把确定的钥匙。由把一个控制堵住的操作模块加到原来的协议[T.G Noh， Phys。加快。Lett。103 (2009 ) 230501 ] ，因此，在爱丽斯和鲍勃二个聚会的极化之间的关联被扩大一个人能用我们的协议散布确定的钥匙和随机的。我们也用我们曾经用于原来的协议的技术给了我们的协议的安全的一个简单证明。最重要地，我们的分析生产比存在的紧密的界限。

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Recently, counterfactual quantum cryptography proposed by T. G. Noh [Phys. Rev. Lett. 103, 230501 (2009)] becomes an interesting direction in quantum cryptography, and has been realized by some researchers (such as Y. Liu et al's [Phys. Rev. Lett. 109, 030501 (2012)]). However, we find out that it is insecure in practical high lossy channel setting. We analyze the secret key rates in lossy channel under a polarization-splitting-measurement attack. Analysis indicates that the protocol is insecure when the loss rate of the one-way channel exceeds $50%$.

arXiv:1312.1436•Dec 5, 2013•2 citations
我们建议一个新 counterfactual 量密码学协议有关关于散布一把确定的钥匙。由把一个控制堵住的操作模块加到原来的协议[T.G Noh， Phys。加快。Lett。103 (2009 ) 230501 ] ，因此，在爱丽斯和鲍勃二个聚会的极化之间的关联被扩大一个人能用我们的协议散布确定的钥匙和随机的。我们也用我们曾经用于原来的协议的技术给了我们的协议的安全的一个简单证明。最重要地，我们的分析生产比存在的紧密的界限。
We propose a new counterfactual quantum cryptography protocol concerning about distributing a deterministic key. By adding a controlled blocking operation module to the original protocol [T.G. Noh, Phys. Rev. Lett. 103 (2009) 230501 ], the correlation between the polarizations of the two parties, Alice and Bob, is extended, therefore, one can distribute both deterministic keys and random ones using our protocol. We have also given a simple proof of the security of our protocol using the technique we ever applied to the original protocol. Most importantly, our analysis produces a bound tighter than the existing ones.
Recently, counterfactual quantum cryptography proposed by T. G. Noh [Phys. Rev. Lett. 103, 230501 (2009)] becomes an interesting direction in quantum cryptography, and has been realized by some researchers (such as Y. Liu et al's [Phys. Rev. Lett. 109, 030501 (2012)]). However, we find out that it is insecure in practical high lossy channel setting. We analyze the secret key rates in lossy channel under a polarization-splitting-measurement attack. Analysis indicates that the protocol is insecure when the loss rate of the one-way channel exceeds 5050%50.