Phase-Matching Quantum Cryptographic Conferencing

Zhao, Shuai1,2,3,4; Zeng, Pei5; Cao, Wen-Fei1,2,3,4; Xu, Xin-Yu1,2,3,4; Zhen, Yi-Zheng1,2,3,4,6; Ma, Xiongfeng5; Li, Li1,2,3,4; Liu, Nai-Le1,2,3,4; Chen, Kai1,2,3,4

2020-08-05

10.1103/PhysRevApplied.14.024010

Physical Review Applied   影响因子和分区

2331-7019

Quantum cryptographic conferencing (QCC) holds promise for distributing information-theoretic secure keys among multiple users over a long distance. Limited by the fragility of Greenberger-Horne-Zeilinger (GHZ) states, QCC networks based on directly distributing GHZ states over a long distance still face a big challenge. Another two potential approaches are measurement device-independent QCC and conference-key agreement with single-photon interference, which were proposed on the basis of the postselection of GHZ states and the postselection of the W state, respectively. However, implementations of the former protocol are still heavily constrained by the transmission rate eta of optical channels and the complexity of the setups for postselecting GHZ states. Meanwhile, the latter protocol cannot be cast as a measurement device-independent prepare-and-measure scheme. Combining the idea of postselecting GHZ states and recently proposed twin-field quantum-key-distribution protocols, we report a QCC protocol based on weak coherent-state interferences named "phase-matching quantum cryptographic conferencing," which is immune to all detector side-channel attacks. The proposed protocol can improve the key-generation rate from O(eta(N)) to O(eta(N-1)) compared with the measurement device-independent QCC protocols. Meanwhile, it can be easily scaled up to multiple parties due to its simple setup.

SCI ; EI

英语

其他

National Natural Science Foundation of China[11575174][11374287][11574297][11875173][11674193] ; National Key R&D Program of China[2017YFA0303900][2017YFA0304004]

Physics

Physics, Applied

WOS:000556159400004

AMER PHYSICAL SOC

20204109309396

Side channel attack ; Particle beams ; Quantum cryptography ; Information theory ; Light transmission

Electronic Circuits:713 ; Information Theory and Signal Processing:716.1 ; Light/Optics:741.1 ; High Energy Physics:932.1

Web of Science

1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
2.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
3.Univ Sci & Technol China, CAS Ctr Excellence, Hefei 230026, Anhui, Peoples R China
4.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China
5.Tsinghua Univ, Ctr Quantum Informat, Inst Interdisciplinary Informat Sci, Beijing 100084, Peoples R China
6.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Zhao, Shuai,Zeng, Pei,Cao, Wen-Fei,et al. Phase-Matching Quantum Cryptographic Conferencing[J]. Physical Review Applied,2020,14(2).

Zhao, Shuai.,Zeng, Pei.,Cao, Wen-Fei.,Xu, Xin-Yu.,Zhen, Yi-Zheng.,...&Chen, Kai.(2020).Phase-Matching Quantum Cryptographic Conferencing.Physical Review Applied,14(2).

Zhao, Shuai,et al."Phase-Matching Quantum Cryptographic Conferencing".Physical Review Applied 14.2(2020).