Due to the worrying climate of insecurity in the world and growing awareness about it, the biometric technology is increasingly recognized as an effective mechanism of control of high security. These biometric systems consist in a collection of digital technologies that use people´s physiological features as a means of authenticity. There are diverse biometric mechanisms that are used to identify an individual unmistakable. These systems use different features such as fingerprints, hands, face, iris, voice, among others. Biometric systems offer a safer identification system than traditional passwords. These systems also offer non-invasive recognition. For that reason, in many cases, they do not need much cooperation from the user to be recognized for the system.