Biometric

Biometric:

Biometric identifiers are the distinctive, measurable characteristics used to label and describe individuals. Biometric identifiers are often categorized as physiological versus behavioral characteristics.

 Physiological characteristics are related to the shape of the body. Examples are fingerprint, face recognition, DNA, Palm print, hand geometry, iris recognition, retina and scent.

Behavioral characteristics are related to the pattern of behavior of a person, such as:  typing rhythm, gait, and voice.

Iris recognition:

Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on video images of the irides of an individual's eyes, whose complex random patterns are unique and can be seen from some distance.

Finger print recognition:

Fingerprint recognition or fingerprint authentication refers to the automated method of verifying a match between two human fingerprints. Fingerprints are one of many forms of biometrics.

Voice recognition:

Speaker recognition is the identification of the person who is speaking by characteristics of their voices (voice biometrics), also called voice recognition. There is a difference between speaker recognition (recognizing who is speaking) and speech recognition (recognizing what is being said). These two terms are frequently confused, and "voice recognition" can be used for both.