The basic premise of biometric authentication is that every person is unique and each individual can be identified by his or her intrinsic or behavior traits. Biometric technology is able to recognize a person on the basis of the unique features of their face, fingerprint, signature, DNA or iris pattern and then impart a secure and convenient method for authentication purposes.
Biometrics is therefore the measurement and statistical analysis of a person’s physical and behavioral characteristics. For example, voice recognition systems work by measuring the characteristics of a person’s speech as air is expelled through their lungs, across the larynx and out through their nose and mouth.
The speech verification software will compare these characteristics with data already stored on the server and if the two voice prints are sufficiently similar, the biometric security system will then declare it a match.