Information Leakage Problem in High-Capacity Quantum Secure Communication with Authentication Using Einstein–Podolsky–Rosen Pairs
Zhi-Hao Liu1,2,3, Han-Wu Chen1,2**, Wen-Jie Liu4
1School of Computer Science and Engineering, Southeast University, Nanjing 211189 2Key Laboratory of Computer Network and Information Integration (Ministry of Education), Southeast University, Nanjing 211189 3Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology Sydney, NSW 2007, Australia 4School of Computer and Software, Nanjing University of Information Science & Technology, Nanjing 210044
Abstract：The information leakage problem often exists in bidirectional quantum secure direct communication or quantum dialogue. In this work, we find that this problem also exists in the one-way quantum secure communication protocol [Chin. Phys. Lett. 32 (2015) 050301]. Specifically, the first bit of every four-bit message block is leaked out without awareness. A way to improve the information leakage problem is given.
2016, Vol. 33 
