Efficient Controlled Bidirectional Quantum Secure Direct Communication using entanglement swapping and EPR pairs

02/28/2019

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by   Moein Sarvaghad-Moghaddam, et al.

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In this paper, a novel controlled bidirectional quantum secure direct communication protocol (CBQSDC) is proposed. In this scheme, both users can transmit their secret messages directly and simultaneously under the permission of the controller. The proposed method use feature of entanglement swapping which is led to more efficiency (lowest number of quantum resources (EPR pairs)), security and the lowest number of security checking steps. Also, a generalization of the protocol is explained. Finally, a protocol of CBQSDC-based network is presented.