about biometric security system

Types of Biometrics 

There are basically two types of biometrics:
1. Behavioral biometrics 
2. Physical biometrics 

Behavioral biometric definition : Behavioral biometrics basically measures the characteristics which are acquired naturally over a time. It is generally used for verification. 

Examples of behavioral biometrics include: 

* Speaker Recognition - analyzing vocal behavior 
* Signature - analyzing signature dynamics 
* Keystroke - measuring the time spacing of typed words 

Physical biometric definition : Physical biometrics measures the inherent physical characteristics on an individual. It can be used for either identification or verification. 

Examples of physical biometrics include: 

* Bertillonage - measuring body lengths (no longer used) 
* Fingerprint - analyzing fingertip patterns 
* Facial Recognition - measuring facial characteristics 
* Hand Geometry - measuring the shape of the hand 
* Iris Scan - analyzing features of colored ring of the eye 
* Retinal Scan - analyzing blood vessels in the eye 
* Vascular Patterns - analyzing vein patterns 
* DNA - analyzing genetic makeup

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