Biometric Systems As defined in Computer Security Basics by O'Reilly & Associates, Inc. Biometrics is the use of a persons unique physiological, behavioral, and morphological characteristics to provide positive personal identification. Biometric systems that are currently avaiable today examine fingerprints, handprints, and retina patterns. Systems that are close to biometrics but are not classified as such are behavioral systems such as voice, signature and keystroke systems. They test patterns of behavior not parts of the body. It seems that in the world of biometrics that the more effective the device, the less willing people will be t