首页|Improvement and security analysis of multi-ring discrete modulation continuous variable quantum secret sharing scheme
Improvement and security analysis of multi-ring discrete modulation continuous variable quantum secret sharing scheme
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In order to avoid the complexity of Gaussian modulation and the problem that the traditional point-to-point communi-cation DM-CVQKD protocol cannot meet the demand for multi-user key sharing at the same time,we propose a multi-ring discrete modulation continuous variable quantum key sharing scheme(MR-DM-CVQSS).In this paper,we primarily com-pare single-ring and multi-ring M-symbol amplitude and phase-shift keying modulations.We analyze their asymptotic key rates against collective attacks and consider the security key rates under finite-size effects.Leveraging the characteris-tics of discrete modulation,we improve the quantum secret sharing scheme.Non-dealer participants only require simple phase shifters to complete quantum secret sharing.We also provide the general design of the MR-DM-CVQSS protocol.We conduct a comprehensive analysis of the improved protocol's performance,confirming that the enhancement through multi-ring M-PSK allows for longer-distance quantum key distribution.Additionally,it reduces the deployment complexity of the system,thereby increasing the practical value.
School of Communications and Information Engineering & School of Artificial Intelligence,Xi'an University of Posts and Telecommunications,Xi'an 710121,China
State Key Laboratory of Integrated Service Networks,Xidian University,Xi'an 710071,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of China
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