Google Authenticator is a two-step verification software token based on time and hash algorithm. This software is used for Google's authentication service. Google Authenticator has a fixed algorithm and can be used normally even without network connection on the phone. Currently, the majority of websites support Google Authenticator.

Download and Usage

• Android: Google Authenticator
• iOS: Google Authenticator

If the above links cannot be opened, you can also find it in third-party markets by searching for "Google Authenticator".

Data Backup

Google Authenticator does not have a backup function by default. If your phone is lost or restored to factory settings, you will not be able to recover it, and websites that have enabled two-step verification will not be able to log in. When enabling Google Authenticator, the website will provide a QR code or a security code. It is recommended to save the QR code or security code in a secure place. Here, I recommend using Keepass or Lastpass.

Known Issues

If you are using an Android system and do not have Google framework installed, you cannot use the camera scanning function. You can search for "Google Installer" to install the Google framework.

Summary

You can't have both fish and bear's paw. After enabling two-step verification, you need to get the verification code from Google Authenticator every time, which adds an extra verification step. Security should not be overlooked, so if possible, it is recommended to enable two-step verification.