expression

two-factor authentication

In more detail

a security method that requires two different types of verification to access an account or system, such as a password plus a code sent to your phone

Examples

Many banks now require two-factor authentication to log into your account online.

How to use two-factor authentication

Two-factor authentication is a standard security term used in technology and cybersecurity contexts. It is employed when discussing account security, login procedures, and protective measures against unauthorized access. The term is technically precise and widely understood by both technical and non-technical audiences in modern digital settings.

Common phrases

enable two-factor authentication
set up two-factor authentication
two-factor authentication code
two-factor authentication app
require two-factor authentication

Synonyms

two-step verification · 2FA · dual authentication · multi-factor authentication

A common mistake

Learners sometimes confuse two-factor authentication with password strength alone, not recognizing that it requires two separate and different verification methods rather than just a complex single password.

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