Abstract
By using some ordered Bell states as quantum channel, we propose a protocol for multiparty quantum secret sharing of secure direct communication. The present scheme follows the ideas of dense coding and ping-pong technique. It has a high source capacity as each traveling photon carries two bits of classical secret messages, and has a high intrinsic efficiency because almost all the instances are useful. Since the continuous variable operations instead of the discrete unitary operations used usually are employed to realize the sharing controls, the security of the present protocol is therefore enhanced. Furthermore, due to existing multilevel security checking procedures, the present scheme can prevent against some usual attack strategies.
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Acknowledgements
This work is supported by the Key Project of the Education Department of Anhui Province under Grant No. KJ2010A323, the Talent Project of the Anhui Province for Outstanding Youth under Grant Nos. 2009SQRZ190, 2010SQRL186, 2010SQRL187 and 2011SQRL147, the Natural Science Research Programme of the Education Department of Anhui Province under Grant Nos. KJ2009B018Z and KJ2011B208.
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Yuan, H., Zhou, J., Zhang, G. et al. Efficient Multiparty Quantum Secret Sharing of Secure Direct Communication Based on Bell States and Continuous Variable Operations. Int J Theor Phys 51, 3443–3451 (2012). https://doi.org/10.1007/s10773-012-1228-1
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DOI: https://doi.org/10.1007/s10773-012-1228-1