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Effective October 28, 2019 Duo Security will be transitioning to Cisco's Privacy Statement. View the Duo Privacy Data Sheet.

PHONE CALLBACK

No Smartphone? No Problem.

For offline users or those without a smartphone, they can still authenticate with Duo’s phone callback method. Call any phone number enrolled to a user and let them confirm their identity by answering the call and pressing a key.

Administrators can configure the sender’s phone number and specific keys to press to approve and deny authentication and report fraud.

Phone callback is just one of many other two-factor authentication methods that Duo provides to support your diverse user base.

Watch how Duo works with any phone.