A Human Machine Interface (HMI) is a digital platform that allows humans to interact visually and control machines, devices, or industrial processes. HMIs present data from machinery in a user-friendly way, often through graphical interfaces like touchscreens or computer displays. Operators use HMIs to monitor system performance, adjust settings, and respond to alerts or malfunctions. In cybersecurity, HMIs are critical points of access and can be targets for attacks aiming to disrupt operations or steal sensitive data. Protecting HMIs involves securing network connections, enforcing strong authentication, and regularly updating software to mitigate vulnerabilities.