Authenticator apps are available for every popular mobile platform, including iOS (shown here), Android, and Windows Phone Passwords alone are hopelessly weak and fragile security measures.

You can either scan a QR code using the camera on your smartphone or manually enter the code. When you see a QR code on the laptop screen, open the Google Authenticator app on your phone.

Microsoft Authenticator generates those types of codes. It’s extremely useful for quick sign-ins, it works cross-platform, and it’s faster than email or text codes. You can also use the app ...

Most sites will have you verify that the code in Authenticator is working before you start using it to log in. The benefits of an app like Google Authenticator, besides not having an SMS message ...