Comment on "Improvement of Controlled Bidirectional Quantum Direct Communication Using a GHZ State" [Chin. Phys. Lett. 30 (2013) 040305]

被引：29

作者：

Liu Zhi-Hao ^{[1
]}

Chen Han-Wu ^{[1
]}

机构：

[1] Southeast Univ, Sch Comp Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2013年 / 30卷 / 07期

关键词：

D O I：

10.1088/0256-307X/30/7/079901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The problem of definite information leakage existing in the controlled bidirectional quantum direct communication protocol using GHZ states [Chin. Phys. Lett. 23 (2006) 1680] was pointed out by Ye and Jiang [Chin. Phys. Lett. 30 (2013) 040305]. Then, they proposed two strategies to improve this security bug. However, if the revised versions are analyzed from the viewpoint of information theory, it can be found that they still have the problem of information leakage. That is, three quarters and one half of the information interchanged by the communication parties are leaked out unknowingly in the first and second revised protocols, respectively.

引用

页数：1

共 27 条

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