MrSeb writes "A cross-disciplinary team of US neuroscientists and cryptographers have developed a password/passkey system that removes the weakest link in any security system: the human user. It's ingenious: The system still requires that you enter a password, but at no point do you actually remember the password, meaning it can't be written down and it can't be obtained via coercion or torture — i.e. rubber-hose cryptanalysis. The system, devised by Hristo Bojinov of Stanford University and friends from Northwestern and SRI, relies on implicit learning, a process by which you absorb new information — but you're completely unaware that you've actually learned anything; a bit like learning to ride a bike. The process of learning the password (or cryptographic key) involves the use of a specially crafted computer game that, funnily enough, resembles Guitar Hero. Their experimental results suggest that, after a 45 minute learning session, 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."
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