X has announced plans to deactivate the twitter.com domain, necessitating users to rebind their security keys and Passkeys to x.com within two weeks. This change affects accounts using hardware security keys or Passkeys, which must be re-registered by November 10th to avoid being locked. X clarified that this update is unrelated to any security incidents and does not impact other two-factor authentication methods like the Authenticator app. Users who fail to rebind by the deadline will need to re-register, switch to another 2FA method, or disable 2FA to regain account access.