Twitter Limites SMS-based Two-factor Authentication

Twitter previously offered SMS-based two-factor authentication as an additional layer of security for user accounts. However, the company recently announced that it would be phasing out this feature due to security concerns.

SMS-based two-factor authentication involves receiving a verification code via text message that is then entered into the Twitter login screen to complete the authentication process. While this method is more secure than using a single password for authentication, it is not without its risks.

One of the main concerns with SMS-based two-factor authentication is that it is vulnerable to SIM swapping attacks. In a SIM swap attack, an attacker gains control of the victim's phone number by convincing the victim's cellular provider to transfer the number to a SIM card controlled by the attacker. Once the attacker has control of the victim's phone number, they can intercept the verification code and use it to gain access to the victim's account.

In addition, SMS-based two-factor authentication can be vulnerable to phishing attacks, where attackers trick users into providing their login credentials, including the verification code sent via SMS. By doing so, attackers can gain access to the user's account and use it for malicious purposes.

For these reasons, Twitter has decided to phase out SMS-based two-factor authentication in favor of more secure methods, such as security keys or authentication apps. These methods provide a stronger level of protection against attacks and reduce the risk of a successful compromise of the user's account.

In conclusion, Twitter has limited SMS-based two-factor authentication due to security concerns, particularly the risk of SIM swapping and phishing attacks. While SMS-based two-factor authentication is better than using a single password, it is not as secure as other options such as security keys or authentication apps. Twitter's decision to phase out this feature is a proactive step in enhancing the security of its platform and protecting its users from potential attacks.