Cryptanalysis and improvement of controlled secure direct communication |
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| Authors: | Kao Shih-Hung Hwang Tzonelih |
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| Institution: | 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 permission from the controller.An improvement is proposed to avoid this flaw. |
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| Keywords: | quantum cryptography quantum communication |
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