The purpose of biometrics is to uniquely identify or verify an individual through the characteristics of the human body.
Biometrics uses characteristics that can be physical such hand shape, a fingerprint, facial characteristics, voice, or DNA. Biometrics can also use characteristics that are learned or acquired, behavioral traits such our signature, they way we speak or use a computer.
How Biometrics Work
Biometric technology must first gather information into a computer database, for example, a database of fingerprints. The computer will compare the fingerprints in the database to any new sample and recognize when there is a match. The matches can be used for both identification or verification purposes.
A biometrics system searches the database for a match to the newly captured sample, and grants access if it is found. Using a fingerprint as part of the login process to a computer is an example of this mode.
A biometrics system searches the database for a match to the newly captured sample, and authenticates an individual’s claimed identity from his or her previously enrolled pattern. Using a palm scanner to unlock a door is an example of this mode.
Current Biometric Technologies
Palm Print Recognition
Palm print recognition is very similar to fingerprint recognition. Both palm and finger biometrics use the information found in the pattern of ridges in the skin.
Fingerprint recognition is probably the best known form of biometrics. See – History of Fingerprinting
Hand geometry is the oldest form of biometrics.
This is how people write in particular the signature of their name.
Vascular Pattern Recognition
This is a very new form of biometrics where infared photography is used to identify the blood vessels in a hand or fingerprint.
This is the identification of the individual by the unique pattern in the iris.
This is the identification of the individual by the unique pattern in the face.
This is the identification of the individual ny the unique pattern of the voice.