Measurement-Device-Independent Quantum Key Distribution Protocols for Heralded Pair Coherent State

In order to eliminate the influence of the channel noise, two new measurement-device-independent quantum key distribution (MDI-QKD) protocols are proposed with logical quantum states. They can resist collective-dephasing noise and collective-rotation noise, respectively. This paper produces logical quantum states by adding the auxiliary light sources, the CNOT operations and the Hadamard transforms in the system model. The main light sources and auxiliary light sources are flexible and easily implemented, since they can be weak coherent state (WCS) sources, heralded single-photon sources (HSPSs) or heralded pair coherent state (HPCS) sources. To generate one key bit, the new MDI-QKD protocols only need one logical qubit with two particles so that they have high qubit efficiency. Moreover, the new protocols also use partial Bell-state measurement (BSM) which is very easily implemented with existing technologies.

Download Full-text

Measurement-device-independent quantum key distribution with modified coherent state

Optics Letters ◽

10.1364/ol.39.000880 ◽

2014 ◽

Vol 39 (4) ◽

pp. 880 ◽

Cited By ~ 15

Author(s):

Mo Li ◽

Chun-Mei Zhang ◽

Zhen-Qiang Yin ◽

Wei Chen ◽

Shuang Wang ◽

...

Keyword(s):

Coherent State ◽

Quantum Key Distribution ◽

Key Distribution ◽

Measurement Device ◽

Measurement Device Independent

Download Full-text

Long-distance measurement-device-independent quantum key distribution with coherent-state superpositions

Optics Letters ◽

10.1364/ol.39.005451 ◽

2014 ◽

Vol 39 (18) ◽

pp. 5451 ◽

Cited By ~ 11

Author(s):

H.-L. Yin ◽

W.-F. Cao ◽

Y. Fu ◽

Y.-L. Tang ◽

Y. Liu ◽

...

Keyword(s):

Coherent State ◽

Quantum Key Distribution ◽

Key Distribution ◽

Distance Measurement ◽

Long Distance ◽

Measurement Device ◽

Measurement Device Independent

Download Full-text

Measurement-device-independent quantum key distribution with leaky sources

Scientific Reports ◽

10.1038/s41598-021-81003-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Weilong Wang ◽

Kiyoshi Tamaki ◽

Marcos Curty

Keyword(s):

Quantum Key Distribution ◽

Communication Systems ◽

Signal Transmission ◽

Information Leakage ◽

Key Distribution ◽

Time Frame ◽

Measurement Device ◽

Decoy State ◽

Unrealistic Assumption ◽

Measurement Device Independent

AbstractMeasurement-device-independent quantum key distribution (MDI-QKD) can remove all detection side-channels from quantum communication systems. The security proofs require, however, that certain assumptions on the sources are satisfied. This includes, for instance, the requirement that there is no information leakage from the transmitters of the senders, which unfortunately is very difficult to guarantee in practice. In this paper we relax this unrealistic assumption by presenting a general formalism to prove the security of MDI-QKD with leaky sources. With this formalism, we analyze the finite-key security of two prominent MDI-QKD schemes—a symmetric three-intensity decoy-state MDI-QKD protocol and a four-intensity decoy-state MDI-QKD protocol—and determine their robustness against information leakage from both the intensity modulator and the phase modulator of the transmitters. Our work shows that MDI-QKD is feasible within a reasonable time frame of signal transmission given that the sources are sufficiently isolated. Thus, it provides an essential reference for experimentalists to ensure the security of implementations of MDI-QKD in the presence of information leakage.

Download Full-text