Sebastian Anthony at ExtremeTech:
By this point, their experimental results suggest that the 30-letter password is firmly implanted in your subconscious brain. Authentication requires that you play a round of the game — but this time, your 30-letter sequence is interspersed with other random 30-letter sequences. To pass authentication, you must reliably perform better on your sequence. Even after two weeks, it seems you are still able to recall this sequence.
This is all kinds of amazing. Inception-esque if you will.