The Big G on Tuesday announced it would roll out an “advanced protection program” to provide stronger Gmail security for high-risk users, such as government officials, political activists and journalists.

Google said that these security settings are aimed at protecting Gmail, Google Drive and YouTube data from phishing attacks, for the users who are likely to be more on hackers’ target.

The advanced security features include an option to require a physical USB security key to log-in, while the Mobile log-ins will require a Bluetooth wireless device.

Google has previously supported the use of physical security keys, but the advanced protection users will have no backup log-in method available if the users lose their keys other than the account recovery process.

Google has created a web page, g.co/advancedprotection, to walk users through setting up advanced protection, including how and where to purchase USB and Bluetooth security keys.

Microsoft has already fixed the Krack Attack vulnerability