Twitter users will have two other ways to authenticate their Twitter log-ins at no cost: an authentication mobile app and a security key.Two factor authentication, or 2FA, requires users to type in their password and then enter a code or security key to access their accounts. It is one of the primary methods for users to keep their Twitter account secure.
As of 2021, only 2.6% of Twitter users had a 2FA method enabled -- and of those, 74.4% used SMS authentication, a Twitter account security report said.
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