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OSU Duo Portal: http://duo.oregonstate.edu
The Duo Mobile app is the fastest and easiest way to use Duo, and is available for iOS and Android devices. It works by sending a "push" (notification) to your device to verify your login attempt. Duo two-step login protects your personal information and the university's data by ensuring you are you when you login to your OSU account. It works because it relies on something that only you know (your password) and something that you have (e.g. your mobile device).