Efficient multiparty quantum secret sharing of secure direct communication

Details Efficient multiparty quantum secret sharing of secure direct communication Efficient multiparty quantum secret sharing of secure direct communication

2005-10-27

arxiv.org/abs/quant-ph/0510212v3

Commun. Theor. Phys., 2007, 47(3):454-458

Physics

Quantum Physics

Scientific paper

In this paper, we present an (n, n) threshold quantum secret sharing scheme of secure direct communication using Greenberger-Horne-Zeilinger state. The present scheme is efficient in that all the Greenberger-Horne-Zeilinger states used in the quantum secret sharing scheme are used to generate shared secret messages except those chosen for checking eavesdropper. In our scheme, the measuring basis of communication parties is invariable and the classical information used to check eavesdropping needs only the results of measurements of the communication parties. Another nice feature of our scheme is that the sender transmit her secret messages to the receivers directly and the receivers recover the sender's secret by combining their results, different from the QSS scheme whose object is essentially to allow a sender to establish a shared key with the receivers. This feature of our scheme is similar to that of quantum secret direct communication.

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