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Quantum computation is gaining popularity as a practical application of quantum physics based on quantum superposition, entanglements, and the no-cloning theorem. Because the security of electronic transactions is vital, various cryptographic protocols based on distributed keys between the intended participants have been created. Complex mathematical models and lengthy keys determine the security of these protocols. These keys, on the other hand, are readily broken. The security of information has undergone a paradigm shift as a result of quantum technologies. The quantum circuits in this thesis were constructed utilizing the IBM quantum experience platform with the goal of realizing safe quantum key distribution (BB84 algorithm). With increasing the number of runs, the possibility of these circuits being realized on a practical quantum computer accessed through the IBM QX online platform increased. Furthermore, there is a significant likelihood of identifying the presence of a third party. The probability of identifying a third-party stealing information increases as the number of qubits increases.