作　　者： ;

机构地区： 陕西理工大学物理与电信工程学院

出　　处： 《光电子．激光》 2012年第2期320-324,共5页

摘　　要： 讨论了1 310 nm相位差分量子密钥分配的特点,分析了强度调制序列攻击机理及其对相位差分量子密钥分配的影响。1 310 nm适宜于10～50 km范围内高速率量子密钥分配,强度调制序列攻击不会改变Bob的探测概率分布,当引入的误码率小于系统的固有误码率时,很难利用诱惑态技术进行打击。基于L.J.Ma等人的实验数据对相位差分量子密钥分配系统的安全性进行了评估。分析结果显示:在序列攻击下,当传输距离为50 km时,安全的密钥生成速率上限值为6.9 Kb/s,因此他们实验生成的密钥是不安全的。 The characteristics of 1310 nm differential-phase-shift quantum key distribution are discussed, the influence of sequential attacks with intensity modulation on which is also analyzed. It indicates that the 1310 nm is suitable for high speed quantum key distribution over 10--50 km distance. Sequential attacks with intensity modulation will not change Bob＇s detection probability and this behavior can be hided by the inherent error rate, so the decoy states technique can not beat it. Based on the L. J. Ma et al experimental data, we evaluated the security of it, and the result indicates that under the sequential attacks, the upper bound of key generation rate is 6.9 Kb/s at 50 km,so it turns out to be insecure.

关 键 词： 量子密钥分配 序列攻击 安全性

领　　域： [电子电信] [电子电信]