Efficient Quantum Secure Direct Communication Protocol Based on Quantum Channel Compression

2019 ◽  
Vol 59 (2) ◽  
pp. 426-435 ◽  
Author(s):  
Georgi Bebrov ◽  
Rozalina Dimova
Keyword(s):  
Quantum Channel ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
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.

A new controlled quantum secure direct communication protocol based on a four-qubit cluster state

2014 ◽  
Vol 28 (24) ◽  
pp. 1450194 ◽  
Author(s):  
Meiling Wang ◽  
Wenping Ma ◽  
Dongsu Shen ◽  
Xunru Yin
Keyword(s):  
Quantum Channel ◽  
Quantum Teleportation ◽  
Communication Protocol ◽  
Cluster State ◽  
Security Analysis ◽  
Quantum Secure Direct Communication ◽  
Secret Message ◽  
Particle Cluster ◽  
Controlled Quantum Teleportation ◽  
Direct Communication

A new controlled quantum secure direct communication (CQSDC) protocol is presented by using a four-particle cluster state as quantum channel and the physical characteristics of controlled quantum teleportation to implement the transmission and the control. In this scheme, the receiver can receive the secret message from the sender and recover the secret message under the permission of the controller. According to the security analysis, the communication is secure against both participant and outside attacks, so this CQSDC protocol is secure and feasible.

QUANTUM SECURE DIRECT COMMUNICATION WITHOUT A PRE-ESTABLISHED SECURE QUANTUM CHANNEL

2006 ◽  
Vol 04 (06) ◽  
pp. 925-934 ◽  
Author(s):  
JIAN WANG ◽  
QUAN ZHANG ◽  
CHAOJING TANG
Keyword(s):  
Quantum Channel ◽  
Communication Protocol ◽  
Communication Protocols ◽  
Quantum Secure Direct Communication ◽  
Secret Message ◽  
Direct Communication ◽  
Einstein Podolsky Rosen ◽  
Secure Channel

Most of the quantum secure direct communication protocols need a pre-established secure quantum channel. Only after ensuring the security of quantum channel can the sender encode the secret message and send it to the receiver through the secure channel. In this paper, we present a quantum secure direct communication protocol using Einstein–Podolsky–Rosen pairs and teleportation. It is unnecessary for the present protocol to ensure the security of the quantum channel before transmitting the secret message. In the present protocol, all Einstein–Podolsky–Rosen pairs are used to transmit the secret message except those chosen for eavesdropping check. We also discuss the security of our protocol under several eavesdropping attacks.

scholarly journals QUANTUM SECURE DIRECT COMMUNICATION WITHOUT USING PERFECT QUANTUM CHANNEL

2006 ◽  
Vol 17 (05) ◽  
pp. 685-692 ◽  
Author(s):  
JIAN WANG ◽  
QUAN ZHANG ◽  
CHAOJING TANG
Keyword(s):  
Quantum Channel ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
Secret Message ◽  
Direct Communication ◽  
Einstein Podolsky Rosen ◽  
Secure Channel

Most of the quantum secure direct communication protocol needs a pre-established secure quantum channel. Only after insuring the security of quantum channel, could the sender encode the secret message and send them to the receiver through the secure channel. In this paper, we present a quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs without insuring the security of quantum channel before transmitting the secret message. Compared with the protocol proposed by Deng et al. [Phys. Rev. A68, 042317 (2003)] and the scheme proposed by Yan et al. [ Euro. Phys. J. B41, 75 (2004)], the present protocol provides higher efficiency.

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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