While SMS codes and authenticator apps are popular options for two-factor authentication, they have some vulnerabilities and limitations. A more secure option is a security key—a physical device that ...

Any account on X that uses a security key will need to re-enroll it. You can do this through security settings on the X website or app. The move is necessary due to the retirement of the twitter.com ...

"By November 10, we’re asking all accounts that use a security key as their two factor authentication (2FA) method to re-enroll their key to continue accessing X. You can re-enroll your existing ...