Analysis and Improvement of Large Payload Bidirectional Quantum Secure Direct Communication Without Information Leakage

作者：Liu, Zhi-Hao^*; Chen, Han-Wu

来源：International Journal of Theoretical Physics, 2018, 57(2): 311-321.

DOI：10.1007/s10773-017-3563-8

• Bidirectional quantum secure direct communication
• Quantum dialogue
• Entanglement swapping
• GHZ state
• Information leakage
• General individual attack

As we know, the information leakage problem should be avoided in a secure quantum communication protocol. Unfortunately, it is found that this problem does exist in the large payload bidirectional quantum secure direct communication (BQSDC) protocol (Ye Int. J. Quantum. Inf. 11(5), 1350051 2013) which is based on entanglement swapping between any two Greenberger-Horne-Zeilinger (GHZ) states. To be specific, one half of the information interchanged in this protocol is leaked out unconsciously without any active attack from an eavesdropper. Afterward, this BQSDC protocol is revised to the one without information leakage. It is shown that the improved BQSDC protocol is secure against the general individual attack and has some obvious features compared with the original one.

• 出版日期2018-2
• 单位东南大学