This: [...] recorded the brain activity of people [...] while they looked at a series of 500 images designed specifically to elicit unique responses from perso

This: [...] recorded the brain activity of people [...] while they looked at a series of 500 images designed specifically to elicit unique responses from person to person [...]. Each image flashed on a monitor for only half a second. Wasn't further addressed as far as I could see. I realize it's a research prototype, and perhaps they can condense that image set down once they figure out which are really good triggers, since spending 250 * 0.5 = 125 seconds = more than two minutes for an authenitication seems a bit much to be practical. I'm a bit scared of what those (hypothetical, I don't know they exist) "power-images" might end up being, though.