Biometric identification are means by which a person can be uniquely identified by evaluating one or more distinguishing biological traits. Unique identifiers include fingerprints, hand geometry, retina and iris patterns and finally, the facial recognition, voice waves, DNA, and signatures. The oldest form of biometric identificationis fingerprinting.
Computerized databases and the digitization of analog data provide almost instantaneous personal identification.
- Iris-pattern and retina-pattern authentication methods are already employed in bank automatic teller machines.
- Voice waveform recognition, a method of verification that has been used for many years with tape recordings in telephone wiretaps, is now being used for access to proprietary databanks in research facilities.
- Facial-recognition technology has been used by law enforcement to pick out individuals in large crowds with considerable reliability, and, todys, are used in time attendance system.
- Hand geometry is being used in industry to provide physical access to buildings.
No matter what biometric methodology is used, the identification verification process remains the same. A record of a person's unique characteristic is captured and kept in a database. Later on, when identification verification is required, a new record is captured and compared with the previous record in the database. If the data in the new record matches that in the database record, the person's identity is confirmed.