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

Journals >Laser & Optoelectronics Progress >Volume 58 >Issue 7 >Page 0727004 > Article

Laser & Optoelectronics Progress
Vol. 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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DOI: 10.3788/LOP202158.0727004 Cite this Article Set citation alerts

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 Copy Citation Text

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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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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

Table 1. Alice’s bit encoding in three-state protocol

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