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Reexamining the Security of Controlled Quantum Secure Direct Communication by Using Four Particle Cluster States

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Abstract

A controlled quantum secure direct communication protocol (Zhang et al. in Int. J. Theor. Phys. 48:2971–2976, 2009) by using four particle cluster states was proposed recently. Yang et al. presented an attack with fake entangled particles (FEP attack) and gave an improvement (Yang et al. in Int. J. Theor. Phys. 50:395–400, 2010). In this paper, we reexamine the protocol’s security and discover that, Bob can also take a different attack, disentanglement attack, to obtain Alice’s secret message without controller’s permission. Moreover, our attack strategy also works for Yang’s improvement.

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Acknowledgements

This work is supported by NSFC (Grant Nos. 61170270, 61100203, 60903152, 61003286, 61121061), NCET (Grant No. NCET-10-0260), SRFDP (Grant No. 20090005110010), Beijing Natural Science Foundation (Grant Nos. 4112040, 4122054), the Fundamental Research Funds for the Central Universities (Grant Nos. BUPT2011YB01, BUPT2011RC0505, 2011PTB-00-29, 2011RCZJ15, 2012RC0612).

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  1. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Su-Juan Qin

  2. State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China

    Su-Juan Qin

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  1. Su-Juan Qin
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Correspondence to Su-Juan Qin.

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Qin, SJ. Reexamining the Security of Controlled Quantum Secure Direct Communication by Using Four Particle Cluster States. Int J Theor Phys 51, 2714–2718 (2012). https://doi.org/10.1007/s10773-012-1181-z

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  • DOI: https://doi.org/10.1007/s10773-012-1181-z

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