Twitter nixes tweets by text after CEO Jack Dorsey’s account hack

Twitter on Wednesday halted users’ ability to fire off tweets via text messages as it seeks to fix a vulnerability that led to CEO Jack Dorsey’s account being hijacked. Dorsey last week was the target of so-called “SIM swap” fraud, which enables a hacker to trick a mobile carrier into transferring a number — potentially causing people to lose control not only of social media, but bank accounts and other sensitive information.

This type of attack targets a weakness in the use of “two-factor authentication” via text message to validate access to an account, a break-in method that has grown popular in recent years.

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