Strengthening Passwords by Keystroke Dynamics

This document presents the application of biometrics to strength conventional passwords. We show methods to analyze and compare users´ keystroke patterns to be able to verify their identity when entering the password into a computer system. The problem´s difficulty arises from the fact that only a very limited amount data is available and that new users can come and others may leave the system meantime. That is we are not allowed to re-evaluate all users´ data during the application. We show test results based on 2400 records collected from 25 users of different typing ability.