Teleporting Qubits Between Participants by Third-Party Center

Abstract

As many applied and theoretical challenges still face quantum computing in general and quantum cryptography in particular. The teleportation of qubits from one participant to another has been attracting most of the recent focus in this field. Quantum key distribution is a method as in the classical system that provides secret keys to secure communication channels between legitimate participants through various mechanisms. In this paper, a quantum key exchange protocol is designed to transfer qubits from a trusted third party to both communicators. The Third-Party Center (TPC) initiates secure exchanges between the sender (Alice) and the receiver (Bob). Only legitimate parties share indexes with TPC, where the TPC cannot forge the communication parameters. These parameters include photons applied under an EPR Paradox environment. Therefore, the legitimate parties can share data securely by using a third-party without many restrictions.