Mao Qian-Ping, Wang Le, Zhao Sheng-Mei
Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China.
College of Computer Science and Technology, Nanjing Tech University, Nanjing, 211800, China.
Sci Rep. 2017 Nov 13;7(1):15435. doi: 10.1038/s41598-017-15777-9.
The round-robin differential-phase-shift quantum key distribution (RRDPS-QKD) protocol could provide an effective way to estimate the leakage information without monitoring the signal disturbance. Moreover, the self-compensating property of plug-and-play (P&P) setup can eliminate the variations of phase or polarization in QKD procedure. In the paper, we introduce the P&P concept into RRDPS-QKD, and propose a QKD protocol, named P&P RRDPS-QKD protocol, to make the RRDPS-QKD scheme more practical. We analyze the security, and discuss the key generation rate with infinite-intensity decoy state method. The results show that the proposed protocol is a good solution to RRDPS-QKD protocol with untrusted sources. It has a high security and its key generation rate could be as good as the protocol with trusted sources when the average input photon number N is greater than 10. In addition, the proposed protocol has a high noise tolerance in comparison with P&P BB84-QKD protocol.
循环差分相移量子密钥分发（RRDPS-QKD）协议可以提供一种有效的方法来估计泄漏信息，而无需监测信号干扰。此外，即插即用（P&P）设置的自补偿特性可以消除量子密钥分发过程中相位或偏振的变化。在本文中，我们将即插即用概念引入RRDPS-QKD，并提出一种量子密钥分发协议，称为P&P RRDPS-QKD协议，以使RRDPS-QKD方案更具实用性。我们分析了其安全性，并用无限强度诱饵态方法讨论了密钥生成率。结果表明，所提出的协议是解决具有不可信源的RRDPS-QKD协议的一个很好的方案。它具有很高的安全性，当平均输入光子数N大于10时，其密钥生成率与具有可信源的协议相当。此外，与P&P BB84-QKD协议相比，所提出的协议具有较高的噪声容忍度。
