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SMS Passcodes

No Internet? No Problem

Users without Internet connectivity or smartphones can still authenticate easily with Duo’s SMS passcode method. After completing primary authentication, Duo will send you a one-time passcode via SMS, delivered to your phone.

Type the passcode into the authentication prompt on your screen and press enter to authenticate and access your account. Users can get new passcodes sent to their phones at any time.

Trusted Users

The use of SMS passcodes is one of many two-factor authentication methods that Duo supports to ensure Trusted Users, part of a complete Trusted Access solution.

See how SMS works with Duo


Ready to Get Started?

Try out Duo Access for 30 days to experience Trusted Access.