Multiparty quantum secret sharing of secure direct communication

Details Multiparty quantum secret sharing of secure direct communication Multiparty quantum secret sharing of secure direct communication

2004-03-30

arxiv.org/abs/quant-ph/0403221v4

Physics

Quantum Physics

Scientific paper

10.1016/j.physleta.2005.05.049

Based on the two-step protocol [Phys. Rev. A68(03)042317], we propose a $(n,n)$-threshold multiparty quantum secret sharing protocol of secure direct communication. In our protocol only all the sharers collaborate can the sender's secure direct communication message be extracted. 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.

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