Twitter Limits SMS-Based 2-Factor Authentication to Blue Subscribers Only
Feb 18, 2023
Authentication / Online Security
Twitter has announced that it's limiting the use of SMS-based two-factor authentication (2FA) to its Blue subscribers. "While historically a popular form of 2FA, unfortunately we have seen phone-number based 2FA be used – and abused – by bad actors," the company said . "We will no longer allow accounts to enroll in the text message/SMS method of 2FA unless they are Twitter Blue subscribers." Twitter users who have not subscribed to Blue that have enrolled for SMS-based 2FA have time till March 20, 2023, to switch to an alternative method such as an authenticator app or a hardware security key. After this cutoff date, non-Twitter Blue subscribers will have their option disabled. The alternative methods "require you to have physical possession of the authentication method and are a great way to ensure your account is secure," Twitter noted. Given that SMS has been the least secure form of 2FA , the latest enforcement is likely to force people ...
