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Analyzing and Revising Quantum Dialogue Without Information Leakage Based on the Entanglement Swapping Between any Two Bell States and the Shared Secret Bell State

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Abstract

Information leakage in quantum dialogue (QD) or bidirectional quantum secure direct communication (BQSDC) was found ten years ago, but enough attention was not paid and even wrong conclusions were drawn. It is indeed necessary to emphasize the importance. Here, we find information leakage exists in the QD protocol based on entanglement swapping between any two Bell states and the shared secret Bell state. To be specific, half of the interchanged information is leaked out unconsciously. This is not allowed in a truly secure QD protocol. Afterward, this QD protocol is improved to the one without information leakage. Compared with the original one, there are some obvious advantages in the improved version.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 61502101 and 61170321), and Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20140651 and BK20171458) and the Six Talent Peaks Project of Jiangsu Province (Grant No. XYDXX-003).

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Authors and Affiliations

  1. School of Computer Science and Engineering, Southeast University, Nanjing, 211189, China

    Zhihao Liu & Hanwu Chen

  2. Key Laboratory of Computer Network and Information Integration (Southeast University), Ministry of Education, Nanjing, 211189, China

    Zhihao Liu & Hanwu Chen

  3. Faculty of Engineering and Information Technology, Centre for Quantum Software and Information, University of Technology Sydney, Sydney, NSW, 2007, Australia

    Zhihao Liu

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  1. Zhihao Liu
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  2. Hanwu Chen
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Correspondence to Zhihao Liu or Hanwu Chen.

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Liu, Z., Chen, H. Analyzing and Revising Quantum Dialogue Without Information Leakage Based on the Entanglement Swapping Between any Two Bell States and the Shared Secret Bell State. Int J Theor Phys 58, 575–583 (2019). https://doi.org/10.1007/s10773-018-3955-4

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  • DOI: https://doi.org/10.1007/s10773-018-3955-4

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