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

作　　者：YE Tian-Yu JIANG Li-Zhen 叶天语;蒋丽珍(College of Information&Electronic Engineering,Zhejiang Gongshang University,Hangzhou 310018)

机构地区：[1]College of Information&Electronic Engineering,Zhejiang Gongshang University,Hangzhou 310018

出　　处：《Chinese Physics Letters》2013年第7期259-259,共1页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 60972071;the Natural Science Foundation of Zhejiang Province under Grant Nos Y6100421 and LQ12F02012.

摘　　要：Most recently,Liu and Chen[Chin.Phys.Lett.30(2013)079901]used the tool of information theory to analyze the security of our two improved versions of the MX protocol[Chin.Phys.Lett.30(2013)040305],and they found out that our two improved versions still have the information leakage problem.After revisiting them with the tool of information theory again,with respect to the security,we draw the same conclusion as Liu and Chen.In addition,we point out that how to use a single quantum state as the sole quantum resource to design a bidirectional quantum secure direct communication protocol without information leakage is still a big challenge that needs to be solved.

关 键 词：quantum CONCLUSION addition 

分 类 号：O41[理学—理论物理]