How many basic functions of biometrics are there?

The correct choice indicates that there are two basic functions of biometrics. These functions are crucial for understanding how biometric systems operate and are typically categorized as "recognition" and "verification."

Recognition consists of identifying a person from a set of individuals based on their biometric data. This method is about matching the input data (like a fingerprint or facial recognition) against a database of known biometric templates to see if a match exists.

Verification, on the other hand, involves confirming a person's claimed identity. In this case, the biometric data captured is compared to a specific template associated with that individual, which is typically stored on a secure device.

Understanding these two functions is essential in the context of biometric systems, as they play a vital role in security applications, access control, and authentication processes. This foundation allows for a more profound comprehension of biometric technology's capabilities and limitations in the realm of physical security.