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Jiguang zazhi

Controlled quantum secure direct communication protocol with nonmaximal entangled state

Hongmei Huang

Published Jan 1, 2013• 0 citations
OpenAlex

Abstract

We present a multiparty controlled quantum secure direct communication protocol with the nonmaximal entangled state.The communication parties utilize decoy photons to check eavesdropping.The sender encodes the secret message on the different two particle states directly,controllers carry one united operation on the one of the particle sequence random,the receiver only can recover the secret message under the permission of all the controllers. It is the nonmaximal entangled channel and not easy to be influenced,the protocol is can be realized with existing technique for the two particles state is easy to prepared,all particles are used to transmit secret message,the qubit efficiency is high.

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We present a multiparty controlled quantum secure direct communication protocol with the nonmaximal entangled state.The communication parties utilize decoy photons to check eavesdropping.The sender encodes the secret message on the different two particle states directly,controllers carry one united operation on the one of the particle sequence random,the receiver only can recover the secret message under the permission of all the controllers. It is the nonmaximal entangled channel and not easy to be influenced,the protocol is can be realized with existing technique for the two particles state is easy to prepared,all particles are used to transmit secret message,the qubit efficiency is high.
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To transmit secure message, a controlled quantum secure direct communication protocol is proposed based on five-particle cluster state and EPR pair entanglement swapping. The sender and the controller own their EPR pair sequences respectively. The sender sends one photon of the EPR pair he owns to controller. The controller performs local unitary operation randomly on one photon of the EPR pair he owns and sends it to the receiver as his permission. The sender encodes his secret message on the other photon of the EPR pair he owns and sends it to the receiver. Because of EPR pair entanglement swapping, the two photons in the receiver's hand entangled. Under the permission of the controller, the controller and the receiver measure their new EPR pairs in the Bell basis in turn. By comparing the measurement result of the receiver and the original state, the receiver can get the secret message. To ensure the security of the message transmitting, five photons of five-particle cluster state are all mixed in sending sequence to detect eavesdropping which can bring per qubit 88% eavesdropping detection probability. Compared with taking three photons of five-particle cluster state as detection photons, five photons in this paper will decrease the number of five-particle cluster state for detection greatly. The security of the present protocol is discussed: the detection probability of this protocol is more than 88%, and intercept-measure-resend attacks and correlation-elicitation (CE) attack can be defended effectively.
Quantum secure direct communication (QSDC) aims to allow two remote parties to communicate directly without creating a private key in advance and then using it to encrypt the secret message. In this paper, a multiparty controlled secure quantum communication of d-dimensional is proposed based on d-dimensional maximally entangled Greenberger-Horne-Zeilinger (GHZ) state and teleportation. After using decoy photons to check eavesdropping efficiently for the purpose of the quantum channel security, the sender encodes the secret message of d-dimensional on a sequence of additional particle states and then fulfills teleportation of the secret through d-dimensional Bell state measurement (DBM) and X-basis or Z-basis measurement. The receiver can recover the secret message by combining his measurement result with the senderpsilas and controllerpsilas results. If an eavesdropper Eve cannot escape from the communication parties eavesdropping check, our scheme is completely secure because the transmitting particle sequence does not carry the secret message.
Based on the GHZ-like state, we proposed a new efficient three-party controlled quantum secure direct communication protocol for the sender to send secret information to the receiver with the permission and assistance of the controller. In this scheme, the controller prepares GHZ-like state and performs random unitary operation on the particles, and the sender encodes secret information onto his particles using dense coding and then transmits them though the quantum channel. The receiver can recover the secret information based on the controller's information and the results of the Bell basis measurement. The operations performed by the controller ensure that the receiver cannot obtain any part of the secret information without the permission of the controller. In addition, it is proved that the efficiency of the proposed scheme is higher than the existing protocols by comparison.