Glossary
What is multi-factor authentication?
Multi-factor authentication (MFA) requires two or more independent proofs of identity to log in — typically something you know (a password) plus something you have (a phone or security key) or something you are (a fingerprint). It blocks the majority of attacks that rely on a stolen password alone.
Why MFA matters
Passwords get phished, reused and leaked. MFA adds a second barrier, so even a correct stolen password usually isn't enough to get in. It's one of the highest-impact, lowest-cost security controls available.
MFA dramatically reduces account takeover, credential stuffing and the spread of phishing from compromised accounts.
Not all MFA is equal
SMS codes are better than nothing but can be intercepted or phished. App-based codes are stronger, and phishing-resistant methods like passkeys and hardware security keys are best, because they can't be handed to a fake site.
How to prevent multi-factor authentication
- Enable MFA on email, finance and admin accounts first.
- Prefer phishing-resistant methods (passkeys, security keys) where possible.
- Pair MFA with awareness training so users don't approve unexpected prompts.
- Watch for MFA-fatigue attacks that spam approval requests.
How HookPhish helps
MFA is most effective alongside aware users. HookPhish trains people not to approve unexpected MFA prompts or hand codes to attackers, closing the gap that 'MFA bypass' phishing exploits.
Frequently asked questions
Does MFA stop phishing?+
MFA blocks most stolen-password attacks, but some phishing tries to capture or trick users into approving MFA. Phishing-resistant MFA plus training closes that gap.
What's the strongest type of MFA?+
Phishing-resistant methods like passkeys and hardware security keys are strongest, because the credential can't be handed to a fake site.
Is SMS-based MFA safe?+
It's far better than no MFA, but SMS codes can be intercepted or phished, so use app-based or hardware methods where you can.
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