Multi factor authentication

Multi-factor authentication (MFA) is a security process in which a user is required to provide two or more pieces of evidence (or "factors") to verify their identity. This helps to ensure that the user is who they claim to be, and helps to prevent unauthorized access to sensitive information.

The most common types of factors used in MFA are:

1. Something the user knows: This could be a password, PIN, or security question.
2. Something the user has: This could be a mobile phone, a security token, or a smart card.
3. Something the user is: This could be a fingerprint, an iris scan, or a facial recognition scan.

By requiring multiple factors, MFA makes it more difficult for an attacker to gain unauthorized access to a user's account or information. It is often used as an additional layer of security in addition to a traditional password-based login system.

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