Duo (Cisco Duo)

Cisco Duo is a two-factor authentication (2FA) solution designed to add a second layer of security to online accounts. It addresses the problem that passwords alone are increasingly easy to compromise, as they can be stolen, guessed, or hacked. By requiring a second verification step after entering a username and password, Duo prevents unauthorized access even if a password is known.

The product supports multiple authentication methods, including Duo Push notifications, SMS, voice calls, one-time passcodes, and hardware tokens. It works across a wide range of devices, such as iOS and Android phones and tablets, Apple Watch, Android Wear OS, and computers via Duo Desktop. Duo integrates with various platforms and services, including Duo Single Sign-On, Duo Central, Duo Access Gateway, DuoConnect, and third-party applications like LastPass, Cisco AnyConnect, VMware View, and Citrix Receiver. It also supports passkeys like Touch ID, Face ID, Windows Hello, and security keys.

This guide is intended for end-users whose organizations have already deployed Duo. The product is managed by an organization’s administrator, who determines the authentication methods and settings. Duo offers self-enrollment for users to register their devices and install the mobile app. Pricing and packaging details are not covered in this end-user documentation.