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Quantum secure direct dialogue using Einstein-Podolsky-Rosen pairs

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  • Special Topic: Quantum Information
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Abstract

A two-step quantum secure direct dialogue protocol using Einstein-Podolsky-Rosen (EPR) pair block is proposed. In the protocol, the dialogue messages are encoded on series of qubits and sent through a quantum channel directly. The security of the protocol is assured by its connection to the two-step quantum secure direct communication protocol, which has been proved secure. This protocol has several advantages. It is a direct communication protocol that does not require a separate classical communication for the ciphertext. It has high capacity as two bits of secret messages can be transmitted by an EPR pair. As a dialogue protocol, the two parties can speak to each other either simultaneously or sequentially.

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Authors and Affiliations

  1. State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, China

    Chao Zheng

  2. Tsinghua National Laboratory for Information Science and Technology, Beijing, 100084, China

    Chao Zheng

  3. Department of Physics, Shandong University, Jinan, 250100, China

    GuoFei Long

  4. Department of Physics, Loughborough University, Loughborough, Leicestershire LE, 11 3TU, UK

    GuoFei Long

Authors
  1. Chao Zheng
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  2. GuoFei Long
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Correspondence to Chao Zheng.

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Zheng, C., Long, G. Quantum secure direct dialogue using Einstein-Podolsky-Rosen pairs. Sci. China Phys. Mech. Astron. 57, 1238–1243 (2014). https://doi.org/10.1007/s11433-014-5461-x

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  • DOI: https://doi.org/10.1007/s11433-014-5461-x

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