The Research On Secure Quantum Dialogue Based On Cluster States In Quantum Communication

With the rapid development of society, communication between people isbecoming more and more frequent.The amount of information is growing fast, and thepeople raise higher request to information security.To some extent,the traditionalcommunication system can not satisfy the needs of human beings,so the quantuminformatics appeared at the moment. Quantum informatics is a cross discipline,acombination owing the characteristics of quantum mechanics and informatics. Its oneof the important branches is Quantum Communication, mainly including quantumteleportation,quantum secret sharing,quantum key distribution,quantum secure directcommunication,et al.These all employ quantum mechanics’ important features:no-cloning principle for an unknown state,the quantum uncertainty principle.Thispaper focuses on the secure quantum dialogue scheme, ie., the bidirectional quantumsecure direct communication protocol.First, have a comprehensive understanding research significance, the achievem-ents of the scholars both at home and abroad for quantum communication andquantum dialogue protocol, know of basic knowledge of quantum mechanics appliedin quantum communicationThen, introduce implementation process of the first quantum dialog protocol, inwhich the two communication parties exchange their secret information at the sametime. Analyze the security. The discovery is a historic breakthrough for the field ofquantum communication.Finally, based on the working principle of the first quantum dialogue protocoland the insecurity caused by intercept-resend attack, this paper puts forward twooriginal quantum dialogue scheme: one is quantum dialogue based on the four particleomega states, the other is controlled secure quantum dialogue by using brown state. Inorder to check whether the channel of the communication system is secure or not, thetwo schemes introduce the decoy photons. These solutions not only overcome the theunsecurity caused by intercept-resend attack,but also improve the communicationefficiency by super-dense coding.