Facebook to Add More Account Security Features for Mobile App Next Year

Facebook has said that it will give all users the option to set up physical security keys as a way to verify their identity before logging onto their accounts on the mobile app starting next year.

source https://gadgets.ndtv.com/social-networking/news/facebook-protect-mobile-app-login-physical-security-key-two-factor-authentication-2342602#rss-gadgets-all