Reference-frame-independent quantum key distribution with an untrusted source  

作　　者：Jia-Ji Li Yang Wang Hong-Wei Li Wan-Su Bao 李家骥;汪洋;李宏伟;鲍皖苏(Henan Key Laboratory of Quantum Information and Cryptography,SSF IEU,Zhengzhou 450001,China;Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]Henan Key Laboratory of Quantum Information and Cryptography,SSF IEU,Zhengzhou 450001,China [2]Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Physics B》2020年第3期82-88,共7页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2013CB338002);the National Natural Science Foundation of China(Grant Nos.61505261,61675235,61605248,and 11304397)。

摘　　要：Reference frame independent quantum key distribution(RFI-QKD) allows two legitimate parties to share the common secret keys with the drift of reference frames. In order to reduce the actual requirements of RFI-QKD protocol on light source and make it more suitable for practical applications, this paper gives a specific description of RFI-QKD protocol with an untrusted source and analyzes the practical security of this protocol based on the two-way "plug and play" structure commonly used in practical systems. In addition, we also investigate the performance of RFI-QKD with an untrusted source considering statistical fluctuations based on Chernoff bound. Using simulations, we compare the secret key rate of RFIQKD with an untrusted source to RFI-QKD with trusted source. The results show that the performance of RFI-QKD with an untrusted source is similar to that of RFI-QKD with trusted source, and the finite data size clearly effects the performance of our protocol.Reference frame independent quantum key distribution(RFI-QKD) allows two legitimate parties to share the common secret keys with the drift of reference frames. In order to reduce the actual requirements of RFI-QKD protocol on light source and make it more suitable for practical applications, this paper gives a specific description of RFI-QKD protocol with an untrusted source and analyzes the practical security of this protocol based on the two-way "plug and play" structure commonly used in practical systems. In addition, we also investigate the performance of RFI-QKD with an untrusted source considering statistical fluctuations based on Chernoff bound. Using simulations, we compare the secret key rate of RFIQKD with an untrusted source to RFI-QKD with trusted source. The results show that the performance of RFI-QKD with an untrusted source is similar to that of RFI-QKD with trusted source, and the finite data size clearly effects the performance of our protocol.

关 键 词：quantum KEY distribution REFERENCE FRAME INDEPENDENT finite KEY untrusted SOURCE 

分 类 号：O413[理学—理论物理] TN918.4[理学—物理]