2FA via Authenticator - Now Fully Rolled Out! - Announcements

How to use GitHub two-factor-authentication, using QR Codes, when on Linux without a phone and a camera? - Stack Overflow

Google Online Security Blog: Google Authenticator now supports Google Account synchronization

Google to Auto-Enroll More Users in Two-Factor Authentication, Citing Decrease In Hacks

Set up two-factor authentication (2FA)

Two Factor Authentication in ASP.NET Web API & AngularJS using Google Authenticator - Bit of Technology

Making the case for hardware 2FA in the enterprise

Instagram Announces Support for Two-Factor Authentication Apps and Streamlined Account Verification - MacRumors

Zoom introduces two-factor authentication to boost users' security

How to set up two-factor authentication

Just How Random Are Two Factor Authentication Codes?

How two-factor authentication can protect you from account hacks