![]() Using Google Authenticator on multiple phones is possible but not the intended use. Steps in Using Google Authenticator on Multiple Phones (Not Recommended for Security) As of May 2023, Google Authenticator is also not end-to-end encrypted, raising even more questions about the security of the sync feature. It is quite handy to enable 2FA on multiple devices at once using the sync option nevertheless, you should be aware of the security dangers it entails. Your 2FA accounts will then be accessible whenever you login in. You only need to log in with your Google account to enable the sync option in Google Authenticator. Someone may download the app and obtain the codes if they gain access to your Google account. However, there are security issues with this method, much like with receiving codes over SMS. Any device that has the Authenticator app installed and is signed in with your Google account will have access to your 2FA accounts and their codes. This is overcome by the sync feature that Google Authenticator received in 2023. The secret key is saved locally on your phone when you scan the QR code and close the browser window, so it cannot be generated again. Your Google Authenticator app then receives instructions from that on how to create an infinite number of time-based, one-time passwords. This makes it exceedingly difficult for hackers to manipulate the system because there is no simple way for bad guys to obtain a second-factor authorization sent via a local app that is only available in your pocket, unlike receiving codes via SMS, which is not particularly secure.Ī secret key is used by Google Authenticator to create a QR code when you add a new website or service. In an ideal scenario, 2FA enables you to verify your credentials using a device that you always have on you and to which you have exclusive access. How to Use Google Authenticator on Multiple Phones The sync feature can be turned off by touching the profile symbol in the top right and choosing “Use Without an Account.” All of your 2FA accounts will be linked when you sign in with your Google account in the Authenticator app on a new device. Now, you don’t have to do all of this manual transferring if you have the Account Sync option active, which it is by default.As soon as the accounts are imported, they become immediately accessible in the Authenticator app. Scan the QR code on the device you originally used.On your new device (iPhone or Android), launch the Authenticator software once more, and choose “Transfer Accounts” from the hamburger menu.You must use your new smartphone to scan the QR code that will be produced as a result of this.Select the accounts you want to move, then select “Next.”. ![]()
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