Types of Biometrics Biometrics methods can be of different types depending on the body structure and behavioral characteristics. Namely - a. Biometrics method of body structure and physiological features Face : To analyze facial features . Fingerprint : Analyze the handwriting of each single individual characteristic. Hand Geometry: Analyze the shape of the hand and the length of the finger. Iris : Analyze the colored ring around the eyeball . Retina : Analyze the size of the retina behind the eye. Vein : Analyze the vein pattern of hand and wrist. B. Biometrics method of behavioral traits Voice : To analyze the sound characteristics of each voice , the height of the melody, the silence of the melody , the speed of the vibration, etc. Signature : Analyze handwriting. Typing Keystroke : A specific password that is entered by typing and analyzing.