부산대학교 도서관

How to achieve effective authentication, secure and efficient information transmission of users in different domains are research hotspots in cross-domain communication. In this paper, we proposed an authenticated controlled quantum dialogue protocol based on three-particle GHZ-like states in a cross-domain setting. Controlled quantum dialogue means that the communication between the two communicators needs to be controlled by a third party, and the safe exchange of the secret information of the communicators in a cross-domain setting is achieved with the control of the servers. The GHZ-like states can be used to achieve communicator-to-server authentication and mutual authentication between communicators. Additionally, based on the measurements of the GHZ-like states, two communicators obtain the same key. The proposed protocol has a feasible qubit efficiency of 50%, which can effectively resist external attacks and internal server attacks. [ABSTRACT FROM AUTHOR]