Finite-key analysis for measurement-device-independent quantum key distribution
Finite-key analysis for measurement-device-independent quantum key distribution
复制标题
与测量设备无关的量子密钥分配的有限密钥分析
DOI：
10.1103/physreva.86.022332
复制
发表时间：
2012-08-27
影响因子：
2.9
通讯作者：
Tan, Xiao-Qing
中科院分区：
文献类型：
--
作者：
Song, Ting-Ting;Wen, Qiao-Yan;Tan, Xiao-Qing
在实际的量子密钥分配中，信号脉冲的长度是有限的。无条件量子密钥分发的有限密钥分析是一个亟待解决的问题，而最近提出的一种适合于实际实现的高效量子密钥分发协议--测量设备无关的量子密钥分发（MDI QKD）。我们给出了MDIQKD的有限密钥分析，它去除了所有的检测器侧信道，并产生比完全设备无关的量子密钥分配高出许多阶的密钥速率。在相对频率统计波动的情况下，得到了最终密钥速率的安全界，该界可直接应用于检测效率较低和高损耗信道的实际门限检测器中.的界限进行评估的合理值的观察到的参数。仿真结果表明，当筛选数据数为10（10）时，安全距离约为10 km。此外，由于本文采用了一些简化的处理方法，在实际应用中，安全距离会更长。
The length of signal pulses is finite in practical quantum key distribution. The finite-key analysis of an unconditional quantum key distribution is a burning problem, and the efficient quantum key distribution protocol suitable for practical implementation, measurement-device-independent quantum key distribution (MDI QKD), was proposed very recently. We give the finite-key analysis of MDIQKD, which removes all detector side channels and generates many orders of key rate higher than that of full-device-independent quantum key distribution. The secure bound of the ultimate key rate is obtained under the statistical fluctuations of relative frequency, which can be applied directly to practical threshold detectors with low detection efficiency and highly lossy channels. The bound is evaluated for reasonable values of the observed parameters. The simulation shows that the secure distance is around 10 km when the number of sifted data is 10(10). Moreover the secure distance would be much longer in practice because of some simplified treatments used in our paper.