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Double up on security by protecting your applications and environments with two-factor authentication (2FA). It's the simplest, most effective way to verify that your users are who they say they are. Download the 2FA Evaluation Guide.
When you log into a Duo Single Sign-On (Duo SSO) application that supports passwordless authentication, you will log in with your username and password, and complete Duo two-factor authentication. See the Duo Single Sign-On guide for an example.
Duo Push is our most commonly used two-factor (2FA) authentication method, thanks to its simplicity and reliability. Users just download the Duo Mobile app and are automatically prompted to confirm each login attempt—all it takes is a single tap.
What is Two-Factor Authentication? Two-factor authentication adds a second layer of security to your online accounts. Verifying your identity using a second factor (like your phone or other mobile device) prevents anyone but you from logging in, even if they know your password.
Duo Push is our most commonly-used second factor of authentication in the form, thanks to its simplicity and reliability as a soft token. Users just download the Duo Mobile app and are automatically prompted to confirm each login attempt — all it takes is a single tap.
Device verification: Use Android Biometrics on Android devices. Duo Mobile: Approve Duo Push verification requests on iOS or Android devices, or generate a one-time passcode from the Duo Mobile app. Security key: Tap a WebAuthn/FIDO2 security key. Requires Chrome, Safari, Firefox, or Edge.
Duo is a two-factor authentication solution that helps organizations boost security by verifying user identity, establishing device trust, and providing a secure connection to company networks and applications.
