17 Biggest Data Breaches of All Time

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15. TK/TJ Maxx

No. of records: 94 million
Year: 2007

Company networks had abysmal security in place a decade ago, so it’s not a surprise that hackers got into the TK Maxx wireless LAN and stole what was originally thought to be some 45 million records, before the number doubled. What did the poor security practices of the company reveal? Credit card numbers (the worst kind).

Den Rise/Shutterstock.com

Den Rise/Shutterstock.com

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