Quantum dialogue

An, Nguyen Ba

doi:10.1016/j.physleta.2004.06.009

Cited by 330 publications

(218 citation statements)

References 11 publications

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“…In this paper, we prove that QD protocol presented by [11,12,13,14] are insecure because classical com- * Electronic address: qycai@wipm.ac.cn munication is erroneously used in these protocols. Alice and Bob's encoding operations are correlated given the published measurement results.…”

Section: Introductionmentioning

confidence: 91%

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Classical Correlation in Quantum Dialogue

Tan

Cai

2008

Int. J. Quantum Inform.

102

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Classical communications are used in the post-processing procedure of quantum key distribution. Since the security of quantum key distribution is based on the principles of quantum mechanics, intuitively the secret key can only be derived from the quantum states. We find that classical communications are incorrectly used in the so-called quantum dialogue type protocols. In these protocols, public communications are used to transmit secret messages. Our calculations show that half of Alice's and Bob's secret message is leaked through classical channel. By applying Holevo bound, we can see that the quantum efficiency claimed in the quantum dialogue type of protocols is not achievable.

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Section: Introductionmentioning

confidence: 91%

“…In the entanglement-based QD protocol [12], it is claimed that both Alice and Bob can encode two-bit secret message on an EPR pair. After a public announcement, both Alice and Bob can obtain two-bit secret message from each other.…”

Section: Introductionmentioning

confidence: 99%

Classical Correlation in Quantum Dialogue

Tan

Cai

2008

Int. J. Quantum Inform.

102

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“…And we need checking security only once. Furthermore, we also apply this strategy of secret transmitting order to bidirectional communication, which is so-called quantum dialogue [17]. Our present schemes not only ensure the unconditional security but also improve the efficiency of communication.…”

Section: Introductionmentioning

confidence: 99%

Secure direct communication based on secret transmitting order of particles

Zhu¹,

Xia²,

Fan³

et al. 2006

Phys. Rev. A

263

120

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We propose the schemes of quantum secure direct communication (QSDC) based on secret transmitting order of particles. In these protocols, the secret transmitting order of particles ensures the security of communication, and no secret messages are leaked even if the communication is interrupted for security. This strategy of security for communication is also generalized to quantum dialogue. It not only ensures the unconditional security but also improves the efficiency of communication.

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“…Many people are interested in researching QSDC, and many protocols like QSDC were proposed, including the protocols without using entanglement [15][16][17], the protocols using entanglement [18][19][20][21][22][23] and the two-way QSDC protocols [24][25][26][27][28][29][30][31][32][33].The QSDC protocol can also be used in some special environments as first proposed by Bostr?m et al [34] and Deng et al [18]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Improved Eavesdropping Detection Strategy in Quantum Direct Communication Protocol Based on Five-Particle Cluster State

Jin

Jing

2012

Int J Theor Phys

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In order to improve the eavesdropping detection efficiency in two-step quantum direct communication protocol, an improved eavesdropping detection strategy using four-particle GHZ state is proposed, in which four-particle GHZ state is used to detect eavesdroppers. During the security analysis, the method of the entropy theory is introduced, and two detection strategies are compared quantitatively by using the constraint between the information which eavesdropper can obtain and the interference introduced. If the eavesdroppers intend to obtain all information, the eavesdropping detection rate of the original two-step quantum direct communication protocol by using EPR pair block as detection particles is 50%; while the proposed strategy's detection rate is 88%. In the end, the security of the proposed protocol is discussed. The analysis results show that the eavesdropping detection strategy presented is more secure.

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Quantum dialogue

Cited by 330 publications

References 11 publications

Classical Correlation in Quantum Dialogue

Classical Correlation in Quantum Dialogue

Secure direct communication based on secret transmitting order of particles

Improved Eavesdropping Detection Strategy in Quantum Direct Communication Protocol Based on Five-Particle Cluster State

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