Journal
MATHEMATICS
Volume 10, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/math10203768
Keywords
quantum secret sharing; quantum communications; quantum cryptography
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Funding
- National Natural Science Foundation of China [61871407]
- Special Funds for the Construction of an Innovative Province in Hunan [2022GK2016]
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This paper proposes a multi-participant secret key sharing scheme based on continuous variable quantum communication, which uses a local local oscillator to avoid potential attacks and improve the performance in terms of the maximal transmission distance.
Quantum communications can be conveniently implemented by two participants, but quantum secret key sharing (QSS) through multi-participant communication seems difficult in practice. In this paper, we propose a multi-participant QSS scheme with the local local oscillator (LLO) in continuous variable (CV) quantum communications. It allows an honest participant called a dealer to share a secret key with the others, making it possible to establish a secret key if and only if all participants gather together. The LLO scheme, which eliminates the need for the local oscillator (LO) to be propagated in insecure channels, can be used to avoid the potential LO attack in the traditional CVQSS scheme. Numerical simulation shows that the performance of the LLO-based CVQSS can be improved in terms of the maximal transmission distance even if it is performed with the partially trusted noise.
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