Research On QSDC Protocol Based On Encryption Operation

Nowadays,with the rapid development of science and technology,people pay more and more attention to the safety of communication.In this case,researchers applied the basic principles of quantum mechanics to the classical communication mode,forming a secure communication mode-quantum communication.Compared with classical communication systems,quantum communication has more development advantages: extremely high security,confidentiality,high efficiency and high capacity,strong anti-interference and so on.Quantum communication has obtained many research results in practical application and scientific research,and its future development has become a major research hotspot.Based on the basic principles of quantum mechanics,this paper studies the related contents of controlled quantum safe direct communication and semi-quantum dialogue.The main results are as follows:1.Utilizing three-particle GHZ-like state as quantum channel,the controlled quantum secure direct communication protocol is designed.First,the security of the protocol is increased by encoding the secret information after encryption and introducing auxiliary particles.Second,under the control of the third party,the auxiliary particles are used to expand the amount of information transmission.2.Using the idea of semi-quantum communication,a semi-quantum dialogue protocol using single photon is proposed.On the one hand,the protocol ensures that both communication parties can obtain the secret information sent by the other party at the same time.On the other hand,different encoding and decoding methods are selected based on the different states of both communication parties.The communication particles in the protocol also have certain security detection function,which makes the protocol more secure.