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Cryptanalysis and Improvement of a Quantum Network System of QSS-QDC Using χ-Type Entangled States |
| GAO Gan1**, FANG Ming2, CHENG Mu-Tian3 |
1Department of Electrical Engineering, Tongling University, Tongling 244000
2Jiang Huai College of Anhui University, Hefei 230031
3School of Electrical Engineering and Information, Anhui University of Technology, Maanshan 243002
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| Cite this article: |
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GAO Gan, FANG Ming, CHENG Mu-Tian 2012 Chin. Phys. Lett. 29 110305 |
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Abstract In the paper [Chin. Phys. Lett. 29 (2012) 050303] of Hong et al., two quantum secret sharing protocols were proposed. We study the security of the second protocol and find that it is insecure. Acting as the communication center, Trent may eavesdrop Alice's secret messages without introducing any error. Finally, a feasible improvement of the second protocol is given.
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Received: 31 May 2012
Published: 28 November 2012
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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03.67.-a
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(Quantum information)
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