Improvement of a Multi-Layer Quantum Secret Sharing based on GHZ State and Bell Measurement


Recently, a novel Multi-layer Quantum Secret Sharing (MQSS) scheme based on GHZ state and generalized Bell measurement is presented in [X.-J. Wang, L.-X. An, X.-T. Yu and Z.-C. Zhang, Phys. Lett. A381(38) (2017) 3282.]. The novelty of the MQSS scheme is that a quantum secret can be shared by up to 3n parties at the nth layer. In this paper, we show that the MQSS scheme can be significantly simplified and improved. The improved MQSS scheme is much easier to implement in practice and more efficient. In our improved scheme, the parties of the nth layer need not put their particles together to carry out the generalized Bell measurement, which is needed to share the secret to the next layer in the original scheme. Instead, each party only has to carry out local operations.


Computer Science


This work is supported by Social Science Foundation of Fujian Province, China (No. FJ2018B035), National Natural Science Foundation of China (No. 61802134), and the Scientific Research Fund of Huaqiao University (No. 16BS309).

Keywords and Phrases

Bell measurement; GHZ state; Multi-layer secret sharing; Quantum circuit; Quantum secret sharing

International Standard Serial Number (ISSN)

0219-7499; 1793-6918

Document Type

Article - Journal

Document Version


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© 2018 World Scientific Publishing, All rights reserved.

Publication Date

01 Sep 2018