The invention disclosed herein describes a man-machine interface device for controlling access to electronic devices. The man-machine interface device comprises an electronic display unit including a transparent finger touch sensor region that is seated above the display apparatus, which is responsible for determining the presence and absence of a finger and for generating fingerprint images when a finger is detected. The man-machine interface device also includes a controller unit that is coupled to the display apparatus, the finger touch sensor region, and at least one electronic device. The method of the invention describes a process for authenticating individuals and verifying their security privileges to access sensitive data, based on a finger-touch selection of an icon presented on the display apparatus of the man-machine interface device.