Security Analysis of Three-State Continuous Variable Quantum Key Distribution Protocol Based on Discrete Modulation

Youdong Sun; Yongxin Xing; Tianyi Wang

doi:10.3788/LOP202158.0727004

Laser & Optoelectronics Progress, Volume. 58, Issue 7, 0727004(2021)

Security Analysis of Three-State Continuous Variable Quantum Key Distribution Protocol Based on Discrete Modulation

Youdong Sun, Yongxin Xing, and Tianyi Wang^*

Author Affiliations

College of Big Data and Information Engineering, Guizhou University, Guiyang , Guizhou 550025, China

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Figures & Tables(6)

Fig. 1. Phase space diagram of three-state protocol

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Fig. 2. Schematic of entangled clone attack

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Fig. 3. Security key rates of three-state protocol and four-state protocol under different excess noises

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Fig. 4. Performance comparison of three-state protocols under different modulation variances

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Fig. 5. Security key rate of three-state protocol versus modulation variance under different excess noises

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Table 1. Alice’s bit encoding in three-state protocol
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Table 1. Alice’s bit encoding in three-state protocol
Result =0,= ϕA=0,ϕB=-π/6 ϕA=0,ϕB=-5π/6 =,= =,= =,= =,= =,= =,=
$〈x〉$ 0 $α$ $- α$ $α$ $- α$ 0 $- α$ 0 $α$
A 1 0 1 0 0 1

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Youdong Sun, Yongxin Xing, Tianyi Wang. Security Analysis of Three-State Continuous Variable Quantum Key Distribution Protocol Based on Discrete Modulation[J]. Laser & Optoelectronics Progress, 2021, 58(7): 0727004

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