Biometrics are characteristics of the human body. They are unique to each person and used as attributes to establish personal identity.
Thus, identity can be conveniently fixed through a set of biometric identifiers that have enough resolving power to distinguish unambiguously any given person from the entire group. Multimodal biometrics-based National Identity systems are thus the most popular and effective identity management systems. Not only making the establishment of unique identity easy, but also helps with efficient usage via authentication.