What is two-factor authentication (2FA)?

What is two-factor authentication (2FA)?

Two-factor authentication (2FA), sometimes referred to as two-step verification or dual-factor authentication, is a security process in which users provide two different authentication factors to verify themselves. It is a combination of two of the following:

  • Something you know (your Password)

  • Something you have (such as a text with a code sent to your smartphone or other devices)

  • Something you are (biometrics using your fingerprint, face, or retina)

2FA is implemented to better protect both a user's credentials and the resources the user can access. Two-factor authentication provides a higher level of security than authentication methods that depend on single-factor authentication (SFA), in which the user provides only one factor typically, a password or passcode.

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