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Multi-Factor Authentication
Acronym : MFA
MFA requires at least two independent proofs of identity to access an account: a password combined with a one-time code, a physical key or a biometric factor.
Why it matters
Almost every account takeover exploits a stolen or guessed password; MFA neutralizes this attack even when the attacker already knows the password.
Concrete example
After enabling MFA on their work email, an employee must approve each login from a new device via a notification on their phone.
Related notions
Strong authenticationIdentity managementAccess security
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