Efficient and Secure Two-Way Asynchronous Quantum Secure Direct Communication Protocol by Using Entangled States

2011 ◽  
Vol 135-136 ◽  
pp. 1171-1178
Author(s):  
Min Cang Fu ◽  
Jia Chen Wang
Keyword(s):  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
Entangled States ◽  
Secret Message ◽  
Classical Communication ◽  
Bell Measurement ◽  
Direct Communication ◽  
Von Neumann ◽  
Asymmetric Quantum ◽  
Quantum Protocol

An efficient and secure two-way asynchronous quantum secure direct communication protocol by using entangled states is proposed in this paper. Decoy photons are utilized to check eavesdropping; the securities of the protocol are equal to BB84 protocol. After ensuring the security of the quantum channel, both parties encode the secret message by using CNOT operation and local unitary operation separately. The two-way asynchronous direct transition of secret message can be realized by using Bell measurement and von Neumann measurement, combined with classical communication. Different from the present quantum secure direct communication protocols, the two parties encode secret message through different operations which is equivalent to sharing two asymmetric quantum channels, and the protocol is secure for a noise quantum protocol. The protocol is efficient in that all entangled states are used to transmit secret message.

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.

MULTIPARTY CONTROLLED QUANTUM SECURE DIRECT COMMUNICATION WITH PHASE ENCRYPTION

2011 ◽  
Vol 09 (02) ◽  
pp. 801-807 ◽  
Author(s):  
TIAN-YIN WANG ◽  
QIAO-YAN WEN ◽  
FU-CHEN ZHU
Keyword(s):  
Quantum Mechanics ◽  
Communication Protocol ◽  
Quantum Secure Direct Communication ◽  
Secret Message ◽  
Basic Principles ◽  
Direct Communication

We present a new multiparty controlled quantum secure direct communication protocol with phase encryption, in which the sender's secret message can only be recovered by the receiver under the permission of all the controllers. The security of this scheme is based on the basic principles of quantum mechanics and the secret order of encoding photons.

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.

The impact of resource on remote quantum correlation Preparation

2015 ◽  
Vol 15 (13&14) ◽  
pp. 1223-1232
Author(s):  
Chengjun Wu ◽  
Bin Luo ◽  
Hong Guo
Keyword(s):  
Quantum Entanglement ◽  
Quantum Correlation ◽  
Quantum Discord ◽  
Entangled States ◽  
Shared Resources ◽  
Classical Communication ◽  
Bell Measurement ◽  
Measurement Results ◽  
The Impact

When Alice and Bob share two pairs of quantum correlated states, Alice can remotely prepare quantum entanglement and quantum discord in Bob’s side by measuring the parts in her side and telling Bob the measurement results by classical communication. For remote entanglement preparation, entanglement is necessary . We find that for some shared resources having the same amount of entanglement, when Bell measurement is used, the entanglement remotely prepared can be different, and more discord in the resources actually decreases the entanglement prepared. We also find that for some resources with more entanglement, the entanglement remotely prepared may be less. Therefore, we conclude that entanglement is a necessary resource but may not be the only resource responsible for the entanglement remotely prepared, and discord does not likely to assist this process. Also, for the preparation of discord, we find that some states with no entanglement could outperform entangled states.

Sign in / Sign up

Export Citation Format

Share Document