Analysis and Improvement of Large Payload Bidirectional Quantum Secure Direct Communication Without Information Leakage |
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| Authors: | Zhi-Hao Liu Han-Wu Chen |
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| Affiliation: | 1.School of Computer Science and Engineering,Southeast University,Nanjing,China;2.Key Laboratory of Computer Network and Information Integration (Southeast University),Ministry of Education,Nanjing,China;3.Centre for Quantum Software and Information, Faculty of Engineering and Information Technology,University of Technology Sydney,Sydney,Australia |
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| Abstract: | 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. |
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