When hackers took over the Twitter account of Twitter’s chief executive, Jack Dorsey, last week, they used an increasingly common and hard-to-stop technique that could have given them complete access to his digital activities, including social media, email and financial accounts.
Called SIM swapping, it allows hackers to take control of a victim’s phone number. It has been used to hijack the online personas of politicians, celebrities and notables to steal money all over the world and to simply harass regular people.
