Type for 10 seconds. Roy Maxion can tell your age, sex, culture and old hand injuries.
Professor Maxion takes 50 people at a time and hooks their fingers up to sensors. He then videos, monitors and records their typing patterns, speeds and rhythms with a very accurate clock.
As soon as you have typed 10 numbers or letters, he can work out your sex, your culture, your age and whether you have had any hand injuries.
Keystroke timing can be monitored and used as a biometric in much the same way that handwriting and fingerprints have been used.
It doesn't matter if everyone knows your password, because no one will be able to type it like you do.