An anonymous reader shares a report: Two months after hackers broke into Change Healthcare systems stealing and then encrypting company data, it's still unclear how many Americans were impacted by the cyberattack. Last month, Andrew Witty, the CEO of Change Healthcare's parent company UnitedHealth Group, said that the stolen files include the personal health information of "a substantial proportion of people in America." On Wednesday, during a House hearing, when Witty was pushed to give a more definitive answer, testifying that the breach impacted "I think, maybe a third [of Americans] or somewhere of that level." Read more of this story at Slashdot.

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