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Glossary

Authenticator app

Authenticator app: An authenticator app generates the six-digit login codes used for two-factor authentication on your phone, without needing a text message.

Updated February 1, 2027

An example

Google Authenticator, Microsoft Authenticator, or the authenticator built into a password manager like 1Password or Bitwarden.

Why it matters to you

Codes from an app cannot be intercepted by a SIM swap, which is why they are safer than text codes.

Where to go next

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See also

  • Two-factor authentication

    Two-factor authentication (2FA) is a second check at login, usually a code from an app or a text, so that a stolen password alone is not enough to get in.

  • SIM swap

    A SIM swap is an attack in which a scammer convinces your phone carrier to move your number to their phone, so that they receive your calls and text-message login codes.