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Improvement of Security of Three-Party Quantum Secure Direct Communication Based on GHZ States |
| MAN Zhong-Xiao;XIA Yun-Jie |
| College of Physics and Engineering, Qufu Normal University, Qufu 273165 |
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| Cite this article: |
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MAN Zhong-Xiao, XIA Yun-Jie 2007 Chin. Phys. Lett. 24 15-18 |
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Abstract A protocol for three-party quantum secure direct communication based on Greenberger--Horne--Zeilinger (GHZ) states was recently proposed by Jin it et al. [Phys. Lett. A 354(2006)67] By analysing the protocol we find some security loopholes, e.g. one bit of secret messages of a party (Alice in the original paper) can always be leaked straight to the public without any eavesdropping. These problems suggested previously are discussed and possible solutions are presented to improve the security of the original protocol.
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| Keywords:
03.67.Hk
03.65.Ud
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Published: 01 January 2007
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| PACS: |
03.67.Hk
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(Quantum communication)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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