Abstract
Quantum Secure Direct Communication (QSDC) is a distinctive protocol of quantum communication. It transmits confidential message straight through a quantum channel without the requirement of a secret key and ciphertext. It is also helpful in preventing eavesdropper during transmission. In this article, during the detailed study about QSDC, challenges faced while implementing the mitigation techniques w.r.t possible threats available in practical QSDC, have been studied and demonstrated. From the experiments and results it is observed that practical QSDC has inherent challenges. In actual quantum communication systems, flaws in measurement devices could give rise to disclosure of secret information to Eve without even being noticed. Measurement-device-independent QSDC protocol has been proposed using more than one swapping circuit as a mitigation technique. The efficacy of proposed protocol is verified using quantum simulator and quantum machine in the ideal scenario as well as possible threat scenarios. The results demonstrate its potential over other protocols of quantum communication and contribution towards enabling secure communication.
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