How do you recognize a person? You just "see" him, and your brain tells you whether you know that person or not. When I say "see", I mean that you study the features of the person, if you know him, then you will already have an image of this person in your brain, if what you "see" matches with the image in your mind, you recognize the person, else you term him as a stranger. Well, a biometric system also works in a similar way. It analyzes the features of a person, and decides whether that person has the authority to enter the secured premises.
A biometric identification is generally on the basis of any of the following:
- Voice
- Fingerprint
- Face
- Retina
- Hand geometry
- Iris
- Signature
- DNA
- Finger geometry
Current biometric security systems are configured to identify multiple features instead of just one, and this makes such systems more effective! There are numerous advantages of biometric identification, which make them better than the traditional methods of authentication. The benefits can be stated as follows: Your features have the least probability of changing with time, so, once your feature (fingerprint, hand geometry, etc.) has been registered in a biometric security system, you will never have to renew the data entered in the system. Even 20 years after your features were recorded by the system, the system will identify you (unless the system database has been altered!).
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