Facial recognition makes sense as a method for your computer to recognise you. After all, humans already use a powerful version of it to tell each other apart. But people can be fooled (disguises! twins!), so it’s no surprise that even as computer vision evolves, new attacks will trick facial recognition systems, too. Now researchers have demonstrated a particularly disturbing new method of stealing a face: one that’s based on 3-D rendering and some light Internet stalking.