17 Biggest Data Breaches of All Time

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16. AOL

No. of records: 92 million
Year: 2004

One of the largest early data breaches of this magnitude, the AOL case taught the world that companies not only have to protect themselves from outside threats, but also from inside ones. The person who stole the AOL customer list and sold it to spammers was one of the company’s software engineers. It is estimated that spammers sent about 7 billion emails to their victims.

AOL, Inc. (NYSE:AOL)

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