High-Capacity Quantum Secure Communication with Authentication Using Einstein-Podolsky-Rosen Pairs

Zhihao, Liu ., Han-Wu +2 more

Fu‐Guo Deng, Xihan Li, Chunyan Li +2 more

王朝, 刘建伟, 刘潇 +1 more

Chao Zheng, Guofei Long

Min Xiao, Hongwei Xu

A new protocol for quantum secure communication with authentication is proposed. The proposed protocol has a higher capacity as each EPR pair can carry four classical bits by the XOR operation and an auxiliary photon. The security and efficiency are analyzed in detail and the major advantage of this protocol is that it is more efficient without losing security.

Zhihao Liu, Hanwu Chen, Wenjie Liu

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.