With the potential to be the new poster child for data breach notoriety, Heartland Payment Systems of New Jersey responded quickly to its massive security breach.

After media reports surfaced in January that a malware vulnerability may have exposed up to 100 million cards (but not Social Security numbers, PINs, or private merchant data) over several months, Heartland officials contacted more than 150,000 merchant clients to explain how the breach occurred and what steps the 12-year-old payments firm has taken to prevent another one. Customers were also informed that both the Secret Service and U.S. Justice Department are investigating.

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