Anthem, the second-largest health insurance company in the U.S., admitted today that it got majorly hacked, exposing the Social Security numbers, birthdates, addresses, and more of what may be millions of customers.

Little information has been released about the hack so far, though Anthem President and CEO Joseph R. Swedish called it a "very sophisticated external cyber attack." Anthem discovered the breach last week, and now the FBI and the computer security company Mandiant are involved.

Anthem says it is still working to figure out how many people are affected, though it does not believe hackers were trying to access credit card or medical information. The hackers did, however, obtain "personal information from our current and former members such as their names, birthdays, medical IDs/social security numbers, street addresses, email addresses and employment information, including income data."

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The affected database had records for 80 million people, and it impacts all of Anthem's plans. From the FAQ Anthem has already set up about the hack:

The impacted (plan/brand) include Anthem Blue Cross, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Georgia, Empire Blue Cross and Blue Shield, Amerigroup, Caremore, Unicare, Healthlink, and DeCare.

We're be updating as more information about the hack is available. From the looks of it, this could be a bad one. [Krebs on Security, Anthem FAQ]

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