Revisiting the security of quantum dialogue and bidirectional quantum secure direct communication |
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Authors: | Fei Gao FenZhuo Guo QiaoYan Wen FuChen Zhu |
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Institution: | (1) State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China;(2) School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China;(3) National Laboratory for Modern Communications, Chengdu, 610041, China |
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Abstract: | From the perspective of information theory and cryptography, the security of two quantum dialogue protocols and a bidirectional
quantum secure direct communication (QSDC) protocol was analyzed, and it was pointed out that the transmitted information
would be partly leaked out in them. That is, any eavesdropper can elicit some information about the secrets from the public
annunciations of the legal users. This phenomenon should have been strictly forbidden in a quantum secure communication. In
fact, this problem exists in quite a few recent proposals and, therefore, it deserves more research attention in the following
related study.
Supported by the National High Technology Research and Development Program of China (Grant No. 2006AA01Z419), the National
Natural Science Foundation of China (Grant Nos. 90604023 and 60373059), the National Research Foundation for the Doctoral
Program of Higher Education of China (Grant No. 20040013007), the National Laboratory for Modern Communications Science Foundation
of China (Grant No. 9140C1101010601), the Natural Science Foundation of Beijing (Grant No. 4072020) and the ISN Open Foundation |
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Keywords: | quantum secure direct communication quantum dialogue quantum cryptography cryptanalysis |
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