Operation CardKeeper

Overview
Operation CardKeeper was an international FBI initiative to discover who was behind the theft of tens of thousands of credit card numbers from corporate databases. It resulted in the arrests of thirteen individuals in Poland and eight in the United States after significant international cooperation. Operation CardKeeper also resulted in the U.S. conviction of an individual known online as "John Dillinger," who was sentenced in 2007 to 94 months in federal prison for his carding activity, including aggravated identity theft, among other things. Computers seized from him revealed more than 4,300 compromised account numbers and full identity information for over 1,600 individual victims.