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Cryptanalysis and improvement of the controlled secure direct communication |
Kao Shih-Hung, Hwang Tzonelih |
National Cheng Kung University, Institute of Computer Science and Information Engineering, Tainan City 701, Taiwan, China |
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Abstract This paper points out that, due to a flaw in the sender's encoding, the receiver in Gao et al.'s controlled quantum secret direct communication (CQSDC) protocol [Chin. Phys. 14 (2005), No. 5, p. 893] can reveal the whole secret message without the permission from the controller. An improvement is proposed to avoid this flaw.
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Received: 13 November 2012
Revised: 10 January 2013
Accepted manuscript online:
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PACS:
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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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Fund: This research is partially supported by the National Science Council, Taiwan, (Grant No. NSC 100-2221-E-006-152-MY3). |
Corresponding Authors:
Hwang Tzonelih
E-mail: hwangtl@ismail.csie.ncku.edu.tw
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Cite this article:
Kao Shih-Hung, Hwang Tzonelih Cryptanalysis and improvement of the controlled secure direct communication 2013 Chin. Phys. B 22 060308
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