“Biometrics” is used to detect an intruder based on anomaly intrusion detection system. A new technique is introduced that is user profiling based on Biometrics which is very accurate than Statistical profiling since they are based on behavioral characteristics of user. A new biometrics based technique, which can be used to detect intrusion without the need for any special hardware implementation and without forcing the user to do special actions. The techniques based on “keystroke dynamics” and “mouse dynamics” biometrics does not allow special hardware device for data collection and does not allow passive monitoring. Mouse dynamics is used in GUI base applications, whereas a keyboard is essential for command line base applications.