Cryptanalysis and improvement of efficient quantum dialogue using entangled states and entanglement swapping without information leakage

2017 ◽  
Vol 16 (9) ◽  
Author(s):  
Zhi-Hao Liu ◽  
Han-Wu Chen
Keyword(s):  
Information Leakage ◽  
Entanglement Swapping ◽  
Quantum Dialogue ◽  
Entangled States

Information leakage in quantum dialogue by using the two-qutrit entangled states

2014 ◽  
Vol 28 (12) ◽  
pp. 1450094 ◽  
Author(s):  
Gan Gao
Keyword(s):  
Information Leakage ◽  
Quantum Dialogue ◽  
Entangled States

In this paper [Mod. Phys. Lett. B23 (2009) 2993], Zhang and Zhan proposed a quantum dialogue protocol by using the two-qutrit entangled states. We study the security of the protocol and find that it is not secure. The eavesdropper can obtain half of secret messages without performing any attack. In other words, their quantum dialogue protocol has the drawback of information leakage.

Cryptanalysis and improvement of the robust quantum dialogue protocols based on the entanglement swapping between any two logical Bell states and the shared auxiliary logical Bell state

2019 ◽  
Vol 34 (29) ◽  
pp. 1950241 ◽  
Author(s):  
Zhihao Liu ◽  
Hanwu Chen
Keyword(s):  
Quantum Communication ◽  
Communication Protocol ◽  
Information Leakage ◽  
Bell State ◽  
Entanglement Swapping ◽  
Bell States ◽  
Quantum Dialogue ◽  
Collective Rotation ◽  
Collective Rotation Noise ◽  
Quantum Communication Protocol

As we know, it does not allow that a secure quantum communication protocol has the information leakage problem. Unfortunately, we find that there is the information leakage problem in the two quantum dialogue (QD) protocols which are respectively based on entanglement swapping between two logical Bell states under the collective-dephasing noise and the collective-rotation noise. To mend this loophole, they are masterly improved. It is proven that the improved QD protocols are without information leakage problem. Incidentally, they have some other obvious advantages compared to the previous ones.

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