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Two-Factor Authentication
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What is Duo Two-Factor Authentication?
Two-factor authentication (2FA) adds a second layer of security to your online accounts. Verifying your identity using a second factor (like your phone or other mobile device) prevents anyone but you from logging in, even if they know your password. The University of Cincinnati utilizes Duo Security for two-factor authentication.

How It Works
- Enter username and password as usual
- Verify your identity via the selected Duo authentication mechanism (see options below)
- Securely logged in
You will login as usual with your username and password, and then use your device to verify that it is in fact you. Login approvals can be delivered via a smartphone app push notification, SMS, one-time passcode, or voice call.
Why Is Two-Factor Authentication Needed?
Passwords are becoming easier and easier to compromise and phishing is one of the top social engineering threats that users face. Passwords can be stolen, guessed, or hacked, and many times you may not realize that someone is accessing your account or has breached your data.
Duo adds a second layer of security and keeps your account secure even if your password is compromised. If someone is attempting to login as you, Duo will alert you immediately.
This additional form of authentication is completely independent from your username and password. In other words, Duo never sees your password.
For more information on Duo two-factor authentication, please refer to the Duo KB articles located in the IT@UC Knowledge Base (https://kb.uc.edu).