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Once you've enrolled in Duo you're ready to go: You'll login as usual with your username and password, and then use your device to verify that it's you.
No mobile phone? You can also use a hardware token. Duo lets you link multiple devices to your account, so you can use your mobile phone or two different mobile devices. (define policy)
Why Do I Need This?
Passwords are increasingly easy to compromise. They can often be stolen, guessed, or hacked — you might not even know someone is accessing your account.
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