Improving simultaneous quantum secure direct communication

The proposed method is a quantum secure direct communication scheme in which all users communicate with the central user and each part of these components deliver their private message to other components through the central section. Therefore the communication between each two components is two-sided and through the central section; i.e. each component both sends its private message to other components and receives other`s private messages. Using the measurement results on the qubits, the central section becomes aware of other messages and also in contrast to previous protocols, it enables other components to obtain the messages of each other using the encoding technique of their own private message in another private message. The important point is that there is no quantum or classic channel between the components and only the components with a central section have a channel. The proposed method can be used as a telecommunication network in the future in which each component can make secure communications with the central section and telecommunicate its private message. The proposed message can be generalized to one central section and M sections communicating with it.

کلیدواژه ها:

Direct quantum secure communications ، GHZ4 states ، Quantum interval ، Protocol Efficiency