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

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 ) w...

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Bibliographic Details
Published in:International journal of theoretical physics 2018-02, Vol.57 (2), p.311-321
Main Authors: Liu, Zhi-Hao, Chen, Han-Wu
Format: Article
Language:English
Subjects:
Communication
Elementary Particles
Leakage
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum entanglement
Quantum Field Theory
Quantum Physics
Theoretical
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Summary: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.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-017-3563-8