AC-11 (1) - Pattern-hiding Displays
Control requirements
AC-11 (1) - 0
Conceal, via the device lock, information previously visible on the display with a publicly viewable image.
NIST supplemental guidance
The pattern-hiding display can include static or dynamic images, such as patterns used with screen savers, photographic images, solid colors, clock, battery life indicator, or a blank screen with the caveat that controlled unclassified information is not displayed.