Which statement about biometric authentication is true?

Which statement about biometric authentication is true?

• A. It is guaranteed to be foolproof.
• B. It uses something the user knows.
• C. It provides a unique identifier based on physical characteristics of the user.
• D. It relies on a device's MAC address for authentication.

Answer: (C)

Biometric authentication uses inherent physical or behavioral traits to identify a person, creating a unique link between the trait and the individual. This is why the statement is true: traits like fingerprints, iris patterns, facial geometry, or voice patterns act as a distinctive identifier that can be checked against stored templates to verify identity. Unlike passwords or PINs, you can’t easily share or transfer a biometric trait, which is why it’s categorized as a separate factor. However, it’s not foolproof—there can be false accepts or rejects and potential spoofing, and sensor quality can affect accuracy. It also doesn’t rely on something the user knows or on a device’s MAC address; it relies on the person’s physical characteristics.

Biometric authentication uses inherent physical or behavioral traits to identify a person, creating a unique link between the trait and the individual. This is why the statement is true: traits like fingerprints, iris patterns, facial geometry, or voice patterns act as a distinctive identifier that can be checked against stored templates to verify identity. Unlike passwords or PINs, you can’t easily share or transfer a biometric trait, which is why it’s categorized as a separate factor. However, it’s not foolproof—there can be false accepts or rejects and potential spoofing, and sensor quality can affect accuracy. It also doesn’t rely on something the user knows or on a device’s MAC address; it relies on the person’s physical characteristics.