Editor's Note: For the latest on this story, go to Global Payments: Breach Contained, But Damage Done.
MasterCard and Visa are currently investigating a significant breach at a U.S.-based credit card processor.
"Sources in the financial sector are calling the breach 'massive,' and say it may involve more than 10 million compromised card numbers," writes Krebs on Security's Brian Krebs.
For more on this story, go to Global Payments: Breach Contained, But Damage Done.
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