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Quantum Dialogue Revisited |
| MAN Zhong-Xiao1;ZHANG Zhan-Jun1,2;LI Yong3 |
| 1Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
2School of Physics and Material Science, Anhui University, Hefei 230039
3Department of Physics, Center China Normal University, Wuhan 430079 |
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| Cite this article: |
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MAN Zhong-Xiao, ZHANG Zhan-Jun, LI Yong 2005 Chin. Phys. Lett. 22 22-24 |
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Abstract An entanglement-based quantum dialogue protocol [Phys. Lett. A 328(2004)6] is proven to be insecure: that is, in the protocol an eavesdropper can steal the secret messages without being detected provided that he/she adopts the intercept-and-resend attack strategy. We modify the protocol, i.e. in the control mode, by introducing and randomly choosing two sets of measuring basis: the intercept-and-resend attack can be accordingly detected. Hence, within the present version two users can securely and simultaneously exchange their secret messages.
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| Keywords:
03.67.Hk
03.65.Ud
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Published: 01 January 2005
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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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