ITPEC FE Morning October 2019 Question 43
ITPEC FE Morning October 2019 — Question 43 of 80
Two-Factor Authentication — using two different categories of authentication factors.
Three authentication factor types exist: something you know (password, PIN), something you have (token, smart card), and something you are (biometrics like fingerprint, iris).
Two-factor authentication requires combining factors from two different categories, not just using two items from the same category.
- •Iris = something you are (biometrics)
- •Password = something you know
This combination uses two distinct factor types, making it true two-factor authentication.
Why not others:
- (a) Two different passwords are both "something you know" — same factor type used twice
- (b) A single password with special characters is still just one factor (something you know)
- (c) Fingerprints of two fingers are both "something you are" — same factor type used twice
Key rule: "Two-factor" refers to two different categories of factors, not two instances of the same category.
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