The present invention is directed to a non-transitory machine readable storage medium containing program instructions for displaying digital content while preventing image capture, the non-transitory machine readable storage medium configured to generating a mask to superimpose upon a display object with the mask including one or more transparent portions and one or more opaque portions that blocks the display object therebeneath from viewing; and moving the one or more transparent portions of the mask incrementally to expose various portions of the display object in sequence. The display object may be image, text, video, or any combination thereof. The one or more transparent portions of the mask may have a linear shape extending along a first direction and may move in a second direction substantially perpendicular to the first direction. Alternatively, the one or more transparent portions of the mask may have a sector-shaped opening that rotates to expose the display object.