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Forcible-Measurement Attack on Quantum Secure Direct Communication Protocol with Cluster State |
| GAO Fei1,2, GUO Fen-Zhuo1, WEN Qiao-Yan1, ZHU Fu-Chen3 |
| 1State key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 1008762State Key Laboratory of Integrated Services Network, Xidian University, Xi'an 7100713National Laboratory for Modern Communications, PO Box 810, Chengdu 610041 |
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| Cite this article: |
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GAO Fei, GUO Fen-Zhuo, WEN Qiao-Yan et al 2008 Chin. Phys. Lett. 25 2766-2769 |
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Abstract The security of the quantum secure direct communication (QSDC) protocol with cluster state is analysed. It is shown that the secret would be partially leaked out when an eavesdropper performs forcible measurements on the transmitted particles. With the help of the result in minimum error discrimination, an upper bound (i.e. 40%) of this leakage is obtained. Moreover, the particular measurements which makes the leakage reach this bound are given.
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| Keywords:
03.67.Hk
03.65.Ud
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Received: 03 March 2008
Published: 25 July 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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