The primary function of communication through the Internet is to ensure data security. Internet of Things (IoT) devices have evolved to include embedded systems and sensors capable of connecting, gathering, and sending information to the Internet. The main goal is to secure the entire data path: sensor-to-gateway and gateway-to-server data communication. In conventional cryptosystems, the strength of the encryption key is crucial in preventing unauthorized access to sensitive data. However, its security is limited as discovering a quick way to determine the secret key can lead to a system security breach. Quantum cryptography is a unique type that utilizes a quantum characteristic in transmitting information known as photons to guarantee absolute security for the data being sent. This paper tested three Quantum Key Distribution protocols (BB84, B92, and BBM92) to determine which protocol suits IoT network security using the QuVis simulator. As a result, the B92 protocol is better than the other two protocols. This research proposes a solution to secure an IoT network using Quantum Key Distribution Protocol B92 and the Advanced Encryption Standard (AES).