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A Special Eavesdropping on One-Sender Versus N-Receiver QSDC Protocol |
| GAO Fei1,2;LIN Song1,2;WEN Qiao-Yan1,2;ZHU Fu-Chen3 |
| 1State key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 1008762School of Science, Beijing University of Posts and Telecommunications, Beijing 1008763National Laboratory for Modern Communications, PO Box 810, Chengdu610041 |
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| Cite this article: |
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GAO Fei, LIN Song, WEN Qiao-Yan et al 2008 Chin. Phys. Lett. 25 1561-1563 |
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Abstract We analyse the security of a quantum secure direct communication (QSDC)
protocol and find that an eavesdropper can utilize a special property of GHZ states to elicit all or part of the transmitted secrets without being detected. The particular attack strategy is presented in detail. We give an improved version of this protocol so that it can resist this attack.
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| Keywords:
03.67.Hk
03.65.Ud
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Received: 29 January 2008
Published: 29 April 2008
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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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