"Neuroscientists have found that they can identify individuals based on a coarse map of which brain regions "pair up" in scans of brain activity.
The map is stable enough that the researchers could pick one person's pattern from a set of 126, by matching it to a scan taken on another day.
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"Instead of requiring a typed password or a fingerprint, this security software asks the user to speak or mouth a password directly at a device's camera."