Yahoo reveals that all 3 billion users were affected in 2013 hack

Every Yahoo e-mail user likely had info swiped when the web portal was hacked four years ago.

The company on Tuesday said all 3 billion of its users could have had names, e-mail addresses, phone numbers, birth dates and passwords swiped.

Last year, Yahoo estimated the number of victims was 1 million.

The update was provided after a forensic investigation by an outside firm.

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