ZiggyM writes "Researchers from Hebrew University in Israel have devised a way to assign a password to a user in a way that prevents the user from conciously remember or describe it, yet the user can input it correctly over 90% of the time in a 3 month period after [s]he learns to input it. It involves using visual recognition of previously-seen images, which you can recognize but cant consciously recall in detail. Recognizing the right ones from a series is interpreted as knowing the password, and the chances of guessing it is 1/100,000. Not ready for practical use yet, but very interesting concept that can develop further."
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