This story was originally published and last updated .
Your phone and its associated number are always with you, and only you, so it makes sense that a text message sent to you is a solid secondary method for authenticating a login. But savvy tech users know this method of verification is rife for exploitation: SIM jacking, SS7 attacks, and other hacking methods are now common. A recent investigation showed that it's possible to perform similar attacks with readily-available marketing tools, with the victim none the wiser.
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