Comment on “Improvement of Controlled Bidirectional Quantum Direct Communication Using a GHZ State" [Chin. Phys. Lett. 30 (2013) 040305]
Comment on “Improvement of Controlled Bidirectional Quantum Direct Communication Using a GHZ State" [Chin. Phys. Lett. 30 (2013) 040305]
复制标题
DOI：
10.1088/0256-307x/30/7/079901
复制
发表时间：
2013
影响因子：
3.5
通讯作者：
Z. Liu 刘;Han-Wu 汉武 Chen 陈
中科院分区：
文献类型：
--
作者：
Z. Liu 刘;Han-Wu 汉武 Chen 陈
利用GHZ态的受控双向量子直接通信协议存在的确定性信息泄漏问题[Chin. Phys. Lett. 23（2006）1680]是叶和江[Chin. Phys. Lett. 30（2013）040305]。然后，他们提出了两种策略来改善这个安全漏洞。但是，如果从信息论的角度来分析修订版，可以发现它们仍然存在信息泄露的问题。也就是说，在第一和第二修订协议中，通信方交换的信息的四分之三和一半分别在不知情的情况下泄露。
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.