http://hackaday.com/2009/10/09/safelock-biometric-typing-security/ http://hackaday.com/2009/10/09/safelock-biometric-typing-sec... I experimented with this a c

http://hackaday.com/2009/10/09/safelock-biometric-typing-security/ http://hackaday.com/2009/10/09/safelock-biometric-typing-sec... I experimented with this a couple of years ago when I saw that video, by implementing an ajaxy authentication system that timed keystrokes. Ignoring the fact that you could probably keylog the heck out of it, I found that a single user's typing patterns varied substantially, depending on typing skill, input device, and so on. Oh, well.