Abstract
To improve the efficiency of QKD systems, a new QKD protocol based on classical–quantum polarized channels is proposed in this article. By precoding the raw key with polar codes before communication, this protocol has higher code rate and lower time cost compared with the traditional ones. According to the attack strategies that eavesdroppers might employ, we have analyzed the protocol’s security under ideal and practical channel models. We prove that under proper channel parameter setting, the security of this protocol is not lower than BB84 under intercept strategy.
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This work is supported by the National Nature Science Foundation of China (Nos. 61771222, 61872109), the Basic Research Project of Shenzhen, China (No. JCYJ20170815145900474), the Key Technology Program of Shenzhen, China, (No. JSGG20170824163239586), the Project of Guangzhou Industry Leading Talents (No. CXLJTD-201607), and the Science and Technology Project of Guangzhou (No. 201707010253).
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Yi, Z., Fang, J., Lin, P. et al. Efficient quantum key distribution protocol based on classical–quantum polarized channels. Quantum Inf Process 18, 356 (2019). https://doi.org/10.1007/s11128-019-2423-2
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DOI: https://doi.org/10.1007/s11128-019-2423-2