Research And Simulation Of Controlled Quantum Secure Direct Communication Protocol Based On GHZ-like State

Quantum communication is a combination of communication technology and quantum mechanics.The basic theory of quantum mechanics and the nature of quantum guarantee the "unconditional security" of quantum communication.At present,scientists have achieved good results in the theory and practice of quantum communication.Quantum communication will also have broad application scenarios in the future.This subject mainly studies the controlled quantum secure direct communication protocol in the field of quantum communication.Controlled quantum secure direct communication is one of the important research directions of quantum secret communication technology.At present,many different types of controlled quantum secure direct communication protocols have been proposed by researchers.However,among these protocols,there are few studies on the GHZ-like protocols.In this paper,based on the theory of quantum secret communication,using quantum dense coding and block trans mission,a controlled quantum secure direct communication protocol based on GHZ-like state is proposed,and then the security of the protocol under various attack methods is analyzed.The communication efficiency of the protocol in different calculation methods is calculated.Secondly,for the noise scene in the channel,this paper uses quantum logic gates and linear optical components to give the solution of the protocol in the noisy channel.Finally,a simulation experiment is performed on the entire communication protocol.And the communication process under the noisy channel,and simulated the attack on the protocol by different attack methods to verify the security and feasibility of the protocol.Compared with other controlled quantum secure direct communication protocols,the advantages of the controlled quantum secure direct communication protocol proposed in this paper are:dense coding is used in the protocol,and the communication efficiency of the entire protocol is 66.67%,which is comparable to other existing protocols.It is more efficient than its communication;because the controller performs random unitary operation before sending the particles,the receiver cannot get any information in the secret information without the permission of the controller,thus ensuring the completeness of the controlled person Controlled status,and information will not be leaked.