Quantum Secure Direct Communication Protocol Based on Entangled State and Quantum State

2012 ◽  
Author(s):  
Xiaohui Liu ◽  
Min Nie
Keyword(s):  
Quantum State ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
Entangled State ◽  
Direct Communication

Improvement of a controlled quantum secure direct communication protocol

2014 ◽  
Vol 28 (15) ◽  
pp. 1450121 ◽  
Author(s):  
Dongsu Shen ◽  
Wenping Ma ◽  
Meiling Wang ◽  
Xunru Yin
Keyword(s):  
Quantum Channel ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
The Other ◽  
Secret Message ◽  
Entangled State ◽  
Direct Communication ◽  
Noisy Quantum Channel

A security loophole exists in Gao et al.'s controlled quantum secure direct communication protocol. By employing the security loophole, the receiver can obtain the secret message sent by the sender without the permission of the controller in their protocol. In order to avoid this loophole, we present an improved protocol in this paper. In the improved protocol, entangled particles are prepared at random in two GHZ-like states, which ensure that the receiver is not able to recover the secret message without knowing the initially entangled state. Compared with the other improved version whose security depends on the perfect quantum channel, our improved protocol is secure in a noisy quantum channel. Therefore, our protocol is more practical.

scholarly journals Deterministic Quantum Secure Direct Communication Protocol Based on Hyper-Entangled State

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 43948-43955
Author(s):  
Jian Li ◽  
Zhengyan Zhou ◽  
Na Wang ◽  
Yuan Tian ◽  
Yu-Guang Yang ◽  
...  
Keyword(s):  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
Entangled State ◽  
Direct Communication

Three-Party Simultaneous Quantum Secure Communication with Unidirectional Qubit Transmission

2015 ◽  
Vol 740 ◽  
pp. 857-860
Author(s):  
Xun Ru Yin
Keyword(s):  
Secure Communication ◽  
Closed Loop ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
The Other ◽  
Quantum Channels ◽  
Direct Communication ◽  
Secret Information ◽  
Quantum Secure Communication ◽  
Encoded Particles

A three-party quantum secure direct communication protocol is proposed, in which the qubit transmission forms a closed loop. In this scheme, each party implements the corresponding unitary operations according to his secret bit value over the quantum channels. Then, by performing Bell measurements on the encoded particles, each party can extract the other two parties’ secret information simultaneously. Thus the three parties realize the direct exchange successfully.

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