angry tapir writes "Citigroup suffered about US$2.7 million in losses after hackers found a way to steal credit card numbers from its website and post fraudulent charges. Citi acknowledged the breach earlier this month, saying hackers had accessed more than 360,000 Citi credit card accounts of U.S. customers. The hackers didn't get into Citi's main credit card processing system, but were reportedly able to obtain the numbers, along with the customers' names and contact information, by logging into the Citi Account Online website and guessing account numbers."
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