How to Enable Two-Factor Authentication with Google Authenticator

Google Authenticator is a two-factor authentication software token based on a time-based one-time password (TOTP) algorithm. It is used for Google's authentication services. Google Authenticator uses a fixed algorithm, so it works even without an internet connection on your phone. Currently, most websites support Google Authenticator.

Download and Usage

• Android: Google Authenticator
• iOS: Google Authenticator

If the links above do not work, you can also find the app in third-party markets by searching for "Google Authenticator" or "Google 身份验证".

Data Backup

Google Authenticator does not have a built-in backup function by default. If your phone is lost or reset to factory settings, you will not be able to recover your codes, and you will be unable to log in to websites that have two-factor authentication enabled. When setting up 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 location. We recommend using KeePass or LastPass for this purpose.

Known Issues

If you are using an Android system without Google Play Services installed, the camera scanning function will not work. You can search for "Google Installer" (go 谷歌安装器) to install the necessary Google framework.

Summary

You can't have your cake and eat it too. After enabling two-factor authentication, you need to obtain the verification code from Google Authenticator every time you log in, adding an extra step. However, security issues cannot be ignored. If possible, it is highly recommended to enable two-factor authentication.