Artificial noise is a technique used in communication systems to enhance security and privacy by deliberately introducing random or structured noise signals into the transmission channel. This can help to confuse eavesdroppers and prevent them from intercepting or decoding sensitive information. Artificial noise is often used in wireless communication networks, such as in IoT devices or mobile networks, to protect against malicious attacks and unauthorized access. The design and optimization of artificial noise strategies is an active area of research in the field of information theory and communications engineering.