A group of Chinese computer scientists from academia and industry have published a paper documenting a tool for fooling facial recognition software by shining hat-brim-mounted infrared LEDs on the user's face, projecting CCTV-visible, human-eye-invisible shapes designed to fool the face recognition software.
The tactic lets the attacker specify which face the categorizer should "see" -- the researchers were able to trick the software into recognizing arbitrary faces as belonging to the musician Moby, the Korean politician Hoi-Chang and others.