there is disclosed a secure media device . the secure media device comprises a display , a memory and a processor . the display is used for displaying a presentation . the memory is used to store a representation of the presentation , example in digital form . upon initiation by , for example , a pushbutton , the processor causes the presentation to be displayed on the display . the secure media device may also comprise a loudspeaker . by “ secure ”, it is meant that the contents of the memory may not readily be read by unauthorised personnel . the memory may be integrated with the processor as a singly integrated circuit or may be mounted to a printed circuit board . alternatively , the media device may include an enclosure for preventing unauthorised personnel gaining access to the memory .