Visa, Mastercard Say 10 Million Cards Possibly Compromised in Security Breach [Updated]

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Here is some problematic news: Krebs on Security is reporting that Visa and Mastercard are warning of what sources are calling potentially "massive" security breach of 10 million cards. The companies have been alerting banks of the possible breach at a still-unnamed U.S-based credit-card processor since last week. The processor was apparently compromised between January 21st and February 25th of this year. 

Update: The Wall Street Journal reports that the credit-card processor is Global Payments, Inc. Two sources tell Krebs that the breach is "somehow connected to Dominican street gangs in and around New York City."