Cryptanalysis and improvement of efficient quantum dialogue using entangled states and entanglement swapping 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: | ![]()
The novel quantum dialogue (QD) protocol by using the three-dimensional Bell states and entanglement swapping (Wang et al. in Quantum Inf Process 15(6):2593–2603, 2016) is analyzed. It is shown that there is the information leakage problem in this QD protocol. To be specific, one quarter information of the secret messages exchanged is leaked out unconsciously. Afterward, it is improved to a truly secure one without information leakage. Besides, the security of the improved QD protocol is analyzed in detail. It is shown that the improved QD protocol has some obvious features compared with the original one. |
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