scholarly journals Analysis of statistical fluctuation in decoy state quantum key distribution system

2012 ◽  
Vol 61 (5) ◽  
pp. 050302
Author(s):  
Jiao Rong-Zhen ◽  
Tang Shao-Jie ◽  
Zhang Chao
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Statistical Fluctuation ◽  
Decoy State

Analysis of decoy-state measurement-device-independent quantum key distribution system

2019 ◽  
Vol 17 (01) ◽  
pp. 1950005
Author(s):  
Peng Zhang ◽  
Rong-Zhen Jiao
Keyword(s):  
Finite Length ◽  
Distribution System ◽  
Quantum Key Distribution ◽  
Optimal Estimation ◽  
Key Distribution ◽  
Statistical Fluctuation ◽  
Secret Key ◽  
Measurement Device ◽  
Decoy State ◽  
Measurement Device Independent

The performance of measurement-device-independent quantum key distribution (MDI-QKD) with different numbers of decoy-state are compared. The statistical fluctuation due to the finite length of data is considered based on the standard statistical analysis. The simulation results show that two-decoy-state method is a nearly optimal estimation in the asymptotic case. In the condition of considering statistical fluctuations, the finite length of raw key will slightly decrease the secret key rate. In all simulation cases, the key rate is maximized by optimizing the intensities of the signals. Our numerical simulation may provide valuable theoretical reference for the practical MDI-QKD experiments.

scholarly journals Analysis of decoy state quantum-key-distribution system

2009 ◽  
Vol 58 (4) ◽  
pp. 2189
Author(s):  
Jiao Rong-Zhen ◽  
Zhang Wen-Han
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Decoy State

scholarly journals Analysis statistical fluctuation of passive untrusted source for quantum key distribution system

2013 ◽  
Vol 62 (18) ◽  
pp. 180302
Author(s):  
Jiao Rong-Zhen ◽  
Ding Tian ◽  
Wang Wen-Ji ◽  
Ma Hai-Qiang
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Statistical Fluctuation

scholarly journals DECOY STATE QUANTUM KEY DISTRIBUTION

2010 ◽  
Vol 10 (2) ◽  
pp. 81-86
Author(s):  
Sellami Ali
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Fiber Length ◽  
Key Distribution ◽  
Generation Rate ◽  
Key Generation ◽  
Decoy State ◽  
Set Up

Experimental weak + vacuum protocol has been demonstrated using commercial QKD system based on a standard bi-directional ‘Plug & Play’ set-up. By making simple modifications to a commercial quantum key distribution system, decoy state QKD allows us to achieve much better performance than QKD system without decoy state in terms of key generation rate and distance. We demonstrate an unconditionally secure key rate of 6.2931 x 10-4per pulse for a 25 km fiber length.

scholarly journals Hacking on decoy-state quantum key distribution system with partial phase randomization

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Shi-Hai Sun ◽  
Mu-Sheng Jiang ◽  
Xiang-Chun Ma ◽  
Chun-Yan Li ◽  
Lin-Mei Liang
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Key Distribution ◽  
Single Photon Detection ◽  
Linear Optics ◽  
Photon Detection ◽  
Decoy State ◽  
Partial Phase ◽  
Phase Randomization

Abstract Quantum key distribution (QKD) provides means for unconditional secure key transmission between two distant parties. However, in practical implementations, it suffers from quantum hacking due to device imperfections. Here we propose a hybrid measurement attack, with only linear optics, homodyne detection and single photon detection, to the widely used vacuum + weak decoy state QKD system when the phase of source is partially randomized. Our analysis shows that, in some parameter regimes, the proposed attack would result in an entanglement breaking channel but still be able to trick the legitimate users to believe they have transmitted secure keys. That is, the eavesdropper is able to steal all the key information without discovered by the users. Thus, our proposal reveals that partial phase randomization is not sufficient to guarantee the security of phase-encoding QKD systems with weak coherent states.

scholarly journals Retraction Note: Hacking on decoy-state quantum key distribution system with partial phase randomization

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Shi-Hai Sun ◽  
Mu-Sheng Jiang ◽  
Xiang-Chun Ma ◽  
Chun-Yan Li ◽  
Lin-Mei Liang
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Decoy State ◽  
Partial Phase ◽  
Phase Randomization

High-rate measurement device-independent quantum key distribution system

2019 ◽  
Vol 17 (05) ◽  
pp. 1950041
Author(s):  
Chenlin Xing ◽  
Peiyao Zhong ◽  
Rongzhen Jiao
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Key Distribution ◽  
High Rate ◽  
Measurement Device ◽  
Decoy State ◽  
The Relationship ◽  
Photon Source ◽  
Measurement Device Independent

Measurement device-independent quantum key distribution (MDI-QKD) system is significant for exploring the future communication system because of its outstanding performance in security. In this paper, the key rate of single-photon source and WCP source with common wavelength under ideal infinite-decoy case is analyzed in order to outline the relationship between the key rate and the optimization of light intensity. The performance of the key rate under the simplest situation of finite decoy-state (two decoy-state) is compared. The result may provide important parameters for the practical application of QKD system.

Improved secure bounds for passive decoy state quantum key distribution system

2020 ◽  
Vol 52 (3) ◽  
Author(s):  
Fan Liu ◽  
Chun Zhou ◽  
Yang Wang ◽  
Yahui Gan ◽  
Musheng Jiang ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Decoy State
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