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理论物理通讯：英文版

Controlled Deterministic Secure Quantum Communication Protocol Based on Three-Particle GHZ States in X-Basis

昌燕, 张仕斌, 闫丽丽, 韩桂华

Published Jan 1, 2015• 3 citations
OpenAlex

Abstract

A controlled deterministic secure quantum communication（CDSQC） protocol is proposed based on threeparticle GHZ state in X-basis.Only X-basis and Z1Z2X3-basis（composed of Z-basis and X-basis） measurement are required,which makes the scheme more convenient than others in practical applications.By distributing a random key between both sides of the communication and performing classical XOR operation,we realize a one-time-pad scheme,therefore our protocol achieves unconditional secure.Because only user with legitimate identity string can decrypt the secret,our protocol can resist man-in-the middle attack.The three-particle GHZ state in X-basis is used as decoy photons to detect eavesdropping.The detection rate reaches 75% per qubit.

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A controlled deterministic secure quantum communication（CDSQC） protocol is proposed based on threeparticle GHZ state in X-basis.Only X-basis and Z1Z2X3-basis（composed of Z-basis and X-basis） measurement are required,which makes the scheme more convenient than others in practical applications.By distributing a random key between both sides of the communication and performing classical XOR operation,we realize a one-time-pad scheme,therefore our protocol achieves unconditional secure.Because only user with legitimate identity string can decrypt the secret,our protocol can resist man-in-the middle attack.The three-particle GHZ state in X-basis is used as decoy photons to detect eavesdropping.The detection rate reaches 75% per qubit.
Abstract A controlled deterministic secure quantum communication (CDSQC) protocol is proposed based on three-particle GHZ state in X-basis. Only X-basis and Z 1 Z 2 X 3 -basis (composed of Z-basis and X-basis) measurement are required, which makes the scheme more convenient than others in practical applications. By distributing a random key between both sides of the communication and performing classical XOR operation, we realize a one-time-pad scheme, therefore our protocol achieves unconditional secure. Because only user with legitimate identity string can decrypt the secret, our protocol can resist man-in-the middle attack. The three-particle GHZ state in X-basis is used as decoy photons to detect eavesdropping. The detection rate reaches 75% per qubit.
Extended three-particle GHZ state decoy is introduced in controlled quantum secure direct communication to improve eavesdropping detection probability and prevent correlation-elicitation (CE) attack.Each particle of extended three-particle GHZ state decoy is inserted into sending particles to detect eavesdroppers, which reaches 63% eavesdropping detection probability.And decoy particles prevent the receiver from obtaining the correct correlation between particle 1 and particle 2 before the sender coding on them, so that he can not get any secret information without the controller's permission.In the security analysis, the maximum amount of information that a qubit contains is obtained by introducing the entropy theory method, and two decoy strategies are compared quantitatively.If the eavesdroppers intend to eavesdrop on secret information, the per qubit detection rate of using only two particles of extended threeparticle GHZ state as decoy is 58%;while the presented protocol using three particles of extended three-particle GHZ state as decoy reaches per qubit 63%.
Extended three-particle GHZ state decoy is introduced in controlled quantum secure direct communication to improve eavesdropping detection probability and prevent correlation-elicitation (CE) attack. Each particle of extended three-particle GHZ state decoy is inserted into sending particles to detect eavesdroppers, which reaches 63% eavesdropping detection probability. And decoy particles prevent the receiver from obtaining the correct correlation between particle 1 and particle 2 before the sender coding on them, so that he can not get any secret information without the controller's permission. In the security analysis, the maximum amount of information that a qubit contains is obtained by introducing the entropy theory method, and two decoy strategies are compared quantitatively. If the eavesdroppers intend to eavesdrop on secret information, the per qubit detection rate of using only two particles of extended three-particle GHZ state as decoy is 58%, while the presented protocol using three particles of extended three-particle GHZ state as decoy reaches per qubit 63%.
Three-particle W states are used as decoy photons, and the eavesdropping detection rate reaches 63 %. The positions of decoy photons in information sequence are encoded with identity string ID of the legitimate users. Authentication is implemented by using previously shared identity string. State 丨φ^- ） is used as the carrier. One photon of 丨φ^-） is sent to Bob; and Bob obtains a random key by measuring photons with bases dominated by ID. The bases information is secret to others except Alice and Bob. Both the eavesdropping detection based on three-particle W state and the secret ID ensure the security of the protocol. Unitary operations are not used.
Three-particle W state decoy is introduced in controlled quantum secure direct communication to improve the eavesdropping detection probability and prevent the double-CNOT attack. Each particle of three-particle W state decoy is inserted into sending particles to detect eavesdroppers. The decoy particles inserted randomly can prevent the receiver from obtaining the correct correlation between particle 1 and particle 2 before sender coding on them, so that he can not get any secret information without controller's permission. In the security analysis, the maximum amount of information in a qubit is obtained by introducing the entropy theory method, and two decoy strategies are compared quantitatively. If eavesdroppers intend to eavesdrop on secret information, the per qubit detection rate can reach 64% by using three-particle W state as decoy, but 58% by using extended three-particle GHZ state as decoy.
In this paper, a three-party controlled quantum secure direct communication and authentication (QSDCA) protocol is proposed by using four particle cluster states via a quantum one-time pad and local unitary operations. In the present scheme, only under the permission of the controller, the sender and the receiver can implement secure direct communication successfully. But under any circumstances, Charlie cannot obtain the secret message. Eavesdropping detection and identity authentication are achieved with the help of the previously shared reusable base identity strings of users. This protocol is unconditionally secure in both ideal and practical noisy cases. In one transmission, a qubit of each four particle cluster state is used as controller’s permission and the same qubit with another qubit are used to recover two classical bits of information. In the proposed scheme, the efficiency is improved compared with the previous works.