Twitter says goodbye to free SMS authentication: it’s time to turn it off
If you use the Twitter social network and have not yet deactivated the two-factor authentication method (2FA) via SMS, today is the last day you have to do so. In fact, starting tomorrow, Twitter will insert its two-factor authentication method based on text messages (by virtue of which you receive an authentication code via SMS when logging into the platform) within the package of services included on Twitter Blue, your subscription service.
As part of this change, Twitter will completely disable the 2FA authentication method for user accounts that do not disable SMS verification, or who fail to pay the Blue fee before this deadline, leaving those accounts vulnerable to potential attacks.
Fortunately, users can still activate a free 2FA method using a specific application such as Google Authenticator or Authy, or they can resort to a security key, a solution that, however, requires the purchase of a supporting device.
Twitter’s decision to make its SMS-based 2FA system a paid feature was made because that form is not particularly secure and at least non-subscribers will be tempted to abandon it (in particular, it is subject to an attack that can be completed if the attacker on duty manages to convince the telephone operator to reassign the victim’s SIM phone number).
No more free 2FA SMS authentication on Twitter
To proceed with deactivating the two-factor authentication method, simply access Twitter, select Others in the control panel, enter Security and Account Access and click on Security, which contains the section dedicated to that resource (with the choice between SMS, an authentication application and a token).
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