Passwords fail. Human memory is weak, so we pick familiar terms. To avoid familiar terms, logins require long passwords, with numbers and capitalization and special characters. Humans forget these, because they’re complicated, and so they have to answer security questions, which are things familiar to the person, and therefore discoverable. The greatest failure in online security is often fallible memory. Researchers from Perceptual User Interfaces have a better idea, located inside people’s heads. It uses the unique sounds their skulls make.
