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arXiv quant-ph/0407148quant-ph
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连续变量量子密钥分发中的集体攻击与无条件安全性

Collective attacks and unconditional security in continuous variable quantum key distribution

Frederic Grosshans

摘要:

本文从信息论的角度研究了对基于相干态高斯调制的连续变量密钥分配协议的高斯集体攻击。这些攻击,在以前的安全研究中被忽视,给窃听者在实验相关的有损信道中的有限优势,但没有强大到足以减少反向和解协议的范围。秘密密钥速率给出了理想的情况下,鲍勃进行最佳的集体测量,以及为现实的情况下,他进行零差或外差测量。我们还应用了Christiandl et.等人[Quant-PH/0402131]中描述的方法,以获得这些协议的无条件安全速率。

英文摘要:

We present here an information theoretic study of Gaussian collective attacks on the continuous variable key distribution protocols based on Gaussian modulation of coherent states. These attacks, overlooked in previous security studies, give a finite advantage to the eavesdropper in the experimentally relevant lossy channel, but are not powerful enough to reduce the range of the reverse reconciliation protocols. Secret key rates are given for the ideal case where Bob performs optimal collective measurements, as well as for the realistic cases where he performs homodyne or heterodyne measurements. We also apply the generic security proof of Christiandl et. al. [quant-ph/0402131] to obtain unconditionally secure rates for these protocols.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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