MFA adds increased security by using multiple forms of eAuth mechanisms during a transaction.

• A. A single password.
• B. Multiple forms of eAuth mechanisms.
• C. Biometrics only.
• D. Single use tokens.

Answer: (B)

MFA relies on more than one credential from different categories to prove identity, so a single compromised factor isn’t enough to gain access. In electronic authentication, this means requiring two or more independent mechanisms during a transaction. That’s why the best choice is the option that describes using multiple forms of eAuth mechanisms. A single password provides just one factor, biometrics alone is still one factor, and a single-use token by itself is also only one factor; MFA would combine two or more of these or other factors to strengthen security.