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SAN FRANCISCO (CBSMiami/AP) — The personal information in 500 million Yahoo accounts was stolen in a massive security breakdown. The breach disclosed Thursday, the latest setback for the beleaguered internet company, dates back to late 2014.

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The stolen data includes users’ names, email addresses, telephone numbers, dates of birth, hashed passwords and security questions for verifying an accountholder’s identity. Yahoo is blaming the hack on a “state-sponsored actor.”

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Yahoo is recommending that users change their passwords if they haven’t done so since 2014.

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