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Asymmetric Decoy State Measurement-Device-Independent Quantum Cryptographic Conferencing |
| Rui-Ke Chen1,2, Wan-Su Bao1,2**, Hai-Ze Bao1,2, Chun Zhou1,2, Mu-Sheng Jiang1,2, Hong-Wei Li1,2 |
1Henan Key Laboratory of Quantum Information and Cryptography, Zhengzhou 450001
2Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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Rui-Ke Chen, Wan-Su Bao, Hai-Ze Bao et al 2017 Chin. Phys. Lett. 34 080301 |
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Abstract Measurement-device-independent quantum cryptographic conferencing (MDI-QCC) protocol suggests an important scheme for practical multiparty quantum communication. As far as we know, MDI-QCC or MDI-quantum key distribution protocols always assume that the decoy state strategies used at each user's side are the same. In this study, to mitigate the system complexity and to improve the performance of MDI-QCC protocol in the finite-key case, we propose an asymmetric decoy state method for MDI-QCC protocol, and present security analysis and numerical simulations. From numerical simulations, our protocol can achieve better performance in the finite-key case. That is, with a finite data size of $10^{11}$, it can achieve nonzero secret key rate over 43.6 km.
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Received: 22 March 2017
Published: 22 July 2017
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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| Fund: Supported by the National Basic Research Program of China under Grant No 2013CB338002, and the National Natural Science Foundation of China under Grant Nos 11304397 and 61505261. |
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