Which two would be used for biometric access control? (Choose two.)

Question

Options

• AVoice
• BFingerprint
• CSmart cards
• DPersonal identification number

• A
  76% (44)
• B
  3% (2)
• C
  9% (5)
• D
  12% (7)

Explanation

Biometrics refers to authentication based on unique physical or behavioral characteristics - something you "are." Voice (A) qualifies because it uses a person's unique vocal patterns for identification, and Fingerprint (B) qualifies because it uses the unique ridge patterns on a person's finger. These two are the correct answers, despite the answer key only listing A - both A and B are biometric methods.

Smart cards (C) are incorrect because they fall under "something you have" (a physical token), not a biological trait. A Personal Identification Number (D) is incorrect because it falls under "something you know" (a secret value), not a physical characteristic.

Memory tip: The classic security authentication model is "something you know, something you have, something you are." Biometrics always maps to "something you ARE" - your body. Voice and fingerprints are body-based; PINs and smart cards are not.

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