Facebook no longer requires users to input their phone numbers in order to use two-factor authentication. They can now use 2FA apps like Google Authenticator and Duo.

Duo is UAB’s method for two-factor authentication aids with single sign-on services for major applications such as Office 365, Adobe, myUAB.com, BlazerNET and more. The best way to use 2FA is to use ...

Duo, a two-factor authentication system, will be employed at William & Mary to bring an extra layer of security to sensitive accounts.