Multiparty quantum secret sharing of secure direct communication

Multiparty quantum secret sharing of secure direct communication Based on the two-step protocol (F.G. Deng, G.L. Long, X.S. Liu, Phys. Rev. A 68 (2003) 042317), we propose a ( n , n ) -threshold multiparty quantum secret sharing protocol of secure direct communication. In our protocol, the sender's secure direct communication message can be extracted only if all the sharers collaborate. We show a variant version of this protocol based on the variant two-step protocol. This variant version can considerably reduce the realization difficulty in experiment. In contrast to the use of multi-particle GHZ states in the case that the sharer number is larger than 3, the use and identification of Bell states are enough in our two protocols disregarding completely the sharer number, hence, our protocols are more feasible in technique. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physics Letters A Elsevier

Multiparty quantum secret sharing of secure direct communication

Physics Letters A, Volume 342 (1) – Jul 4, 2005

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Publisher
Elsevier
Copyright
Copyright © 2005 Elsevier B.V.
ISSN
0375-9601
D.O.I.
10.1016/j.physleta.2005.05.049
Publisher site
See Article on Publisher Site

Abstract

Based on the two-step protocol (F.G. Deng, G.L. Long, X.S. Liu, Phys. Rev. A 68 (2003) 042317), we propose a ( n , n ) -threshold multiparty quantum secret sharing protocol of secure direct communication. In our protocol, the sender's secure direct communication message can be extracted only if all the sharers collaborate. We show a variant version of this protocol based on the variant two-step protocol. This variant version can considerably reduce the realization difficulty in experiment. In contrast to the use of multi-particle GHZ states in the case that the sharer number is larger than 3, the use and identification of Bell states are enough in our two protocols disregarding completely the sharer number, hence, our protocols are more feasible in technique.

Journal

Physics Letters AElsevier

Published: Jul 4, 2005

References

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