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Yahoo knew of ‘state-sponsored’ attack in 2014, didn’t disclose until 2016

Yahoo indicated Wednesday at least some of its employees knew in 2014 about a state-sponsored intrusion that compromised more than 500 million accounts despite the incident not being publicly disclosed until roughly two years later.

In a filing made with the U.S. Securities and Exchange Commission this week, Yahoo said an internal review launched this summer has revealed that certain staffers knew about the massive security breach sometime in late 2014.

In July, Yahoo “intensified an ongoing broader review of the company’s network and data security, including a review of prior access to the company’s network by a state-sponsored actor that the company had identified in late 2014,” the filing said. – READ MORE