Abstract
A novel multiparty controlled bidirectional quantum secure direct communication protocol combining continuous-variable states with qubit block transmission is proposed. Two legitimate communication parties encode their own secret information into entangled optical modes with translation operations, and the secret information of each counterpart can only be recovered under the permission of all controllers. Due to continuous-variable states and block transmission strategy, the proposed protocol is easy to realize with perfect qubit efficiency. Security analyses show that the proposed protocol is free from common attacks, including the man-in-the-middle attack.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (grant nos. 61561033 and 61462061), the Foundation for Young Scientists of Jiangxi Province (Jinggang Star) (grant no. 20122BCB23002), the Natural Science Foundation of Jiangxi Province, China (grant no. 20151BAB207002), and the Research Foundation of the Education Department of Jiangxi Province (grant no. GJJ14138).
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Yu, ZB., Gong, LH. & Wen, RH. Novel Multiparty Controlled Bidirectional Quantum Secure Direct Communication Based on Continuous-variable States. Int J Theor Phys 55, 1447–1459 (2016). https://doi.org/10.1007/s10773-015-2784-y
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DOI: https://doi.org/10.1007/s10773-015-2784-y