To protect the accounts of high-risk users from targeted attacks, Google offers its Advanced Protection Program. Advanced Protection limits only Google apps and a handful of third-party apps to your emails and Drive files by adding extra steps to verify your identity during account recovery.

To enroll in Advanced Protection, you’ll need to purchase two security keys and register them with your Google Account. You can also enroll in Advanced Protection using your phone’s built-in security key on Android and iOS.

Google offers its best security system to protect against account hacking, phishing and hackers pretending to be you. However, this system requires the following things:

Google asks you to add two keys to use with Advanced Protection: a primary key that connects to both phones and computers, and a backup key that only connects to computers via USB.