Step-by-step guide to setting up two-factor authentication on Google, Apple, Microsoft, and social platforms for stronger account security.

Add Yahoo as a preferred source to see more of our stories on Google. authenticator-iphone Authenticator apps are available for every popular mobile platform, including iOS (shown here), Android, and ...

Last year, Sergio Caltagirone found himself in a tough spot. While traveling, his phone broke and stopped working completely. With no access to his Google and Microsoft authenticator apps, he lost ...