The security of SARG04 protocol in plug and play QKD system with an untrusted source

2012 ◽  
Vol 12 (7&8) ◽  
pp. 630-647
Author(s):  
Bingjie Xu ◽  
Xiang Peng ◽  
Hong Guo
Keyword(s):  
Quantum Key Distribution ◽  
Source Monitoring ◽  
Photon Number ◽  
Key Distribution ◽  
Statistical Fluctuation ◽  
Statistical Parameters ◽  
Plug And Play ◽  
Monitoring Process ◽  
Simulation Results

The SARG04 protocol is one of the most frequently used protocol in commercial plug-and-play quantum key distribution (QKD) system, where an eavesdropper can completely control or change the photon number statistics of the QKD source. To ensure the security of SARG04 protocol in plug-and-play QKD system with an unknown and untrusted source, the bounds of a few statistical parameters of the source need to be monitored. An active or a passive source monitor schemes are proposed to verify these parameters. Furthermore, the practical issues due to statistical fluctuation and detection noise in the source monitoring process are quantitatively analyzed. Our simulation results show that the passive scheme can be efficiently applied to plug-and-play system with SARG04 protocol.

scholarly journals Simultaneous Classical Communication and Quantum Key Distribution Based on Plug-and-Play Configuration with an Optical Amplifier

Entropy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 333 ◽  
Author(s):  
Xiaodong Wu ◽  
Yijun Wang ◽  
Qin Liao ◽  
Hai Zhong ◽  
Ying Guo
Keyword(s):  
Quantum Key Distribution ◽  
Finite Size ◽  
Key Distribution ◽  
Optical Amplifier ◽  
Coherent Detection ◽  
Secret Key ◽  
Plug And Play ◽  
Classical Communication ◽  
Laser Sources ◽  
Simulation Results

We propose a simultaneous classical communication and quantum key distribution (SCCQ) protocol based on plug-and-play configuration with an optical amplifier. Such a protocol could be attractive in practice since the single plug-and-play system is taken advantage of for multiple purposes. The plug-and-play scheme waives the necessity of using two independent frequency-locked laser sources to perform coherent detection, thus the phase noise existing in our protocol is small which can be tolerated by the SCCQ protocol. To further improve its capabilities, we place an optical amplifier inside Alice’s apparatus. Simulation results show that the modified protocol can well improve the secret key rate compared with the original protocol whether in asymptotic limit or finite-size regime.

scholarly journals Sending-or-Not-Sending Twin-Field Quantum Key Distribution with Light Source Monitoring

Entropy ◽  
2019 ◽  
Vol 22 (1) ◽  
pp. 36
Author(s):  
Yucheng Qiao ◽  
Ziyang Chen ◽  
Yichen Zhang ◽  
Bingjie Xu ◽  
Hong Guo
Keyword(s):  
Light Source ◽  
Quantum Key Distribution ◽  
Source Monitoring ◽  
Selection Process ◽  
Photon Number ◽  
Security Analysis ◽  
Real Life ◽  
Key Distribution ◽  
Transmission Distance ◽  
Security Problem

Twin-field quantum key distribution (TF-QKD) is proposed to achieve a remote key distribution with a maximum secure transmission distance up to over 500 km. Although the security of TF-QKD in its detection part is guaranteed, there are some remaining problems in the source part. The sending-or-not-sending (SNS) protocol is proposed to solve the security problem in the phase post-selection process; however, the light source is still assumed to be an ideal coherent state. This assumption is not satisfied in real-life QKD systems, leading to practical secure issues. In this paper, we discuss the condition that the photon number distribution (PND) of the source is unknown for the SNS protocol, demonstrate that the security analysis is still valid under a source with unknown PND, and show that with light source monitoring, the performance of the SNS protocol can remain almost unchanged.

Phase-matching quantum key distribution with light source monitoring

2021 ◽  
Author(s):  
Wen-Ting Li ◽  
Le Wang ◽  
Wei Li ◽  
Sheng-Mei Zhao
Keyword(s):  
Light Source ◽  
Quantum Key Distribution ◽  
Source Monitoring ◽  
Transmission Loss ◽  
Key Distribution ◽  
Phase Matching ◽  
Measurement Device ◽  
Source Condition ◽  
Source Fluctuation ◽  
The Ideal

Abstract The transmission loss of photons during quantum key distribution(QKD) process leads to the linear key rate bound for practical QKD systems without quantum repeaters. Phase matching quantum key distribution (PM-QKD) protocol, an novel QKD protocol, can overcome the constraint with a measurement-device-independent structure, while it still requires the light source to be ideal. This assumption is not guaranteed in practice, leading to practical secure issues. In this paper, we propose a modified PM-QKD protocol with a light source monitoring, named PM-QKD-LSM protocol, which can guarantee the security of the system under the non-ideal source condition. The results show that our proposed protocol performs almost the same as the ideal PM-QKD protocol even considering the imperfect factors in practical systems. PM-QKD-LSM protocol has a better performance with source fluctuation, and it is robust in symmetric or asymmetric cases.

Plug-and-play sending-or-not-sending twin-field quantum key distribution

2021 ◽  
Vol 20 (10) ◽  
Author(s):  
Ke Xue ◽  
Shengmei Zhao ◽  
Qianping Mao ◽  
Rui Xu
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Plug And Play
Sign in / Sign up

Export Citation Format

Share Document