Federal prosecutors are calling it the largest known data breach scheme in U.S. history. Five defendants (four Russians and one Ukrainian) have been charged with targeting and breaching the networks of major companies to steal credit card numbers resulting in millions of dollars in losses. Among the list of organizations they hacked were 7-Eleven, JC Penney, JetBlue, Hannaford Brothers Co., Heartland Payment Systems Inc., Visa, NASDAQ, and Dow Jones. The hackers are alleged to have stolen over 160 million credit and debit card numbers, which they in turn sold to “cashers.” The cashers would then put the numbers onto magnetic strips on plastic cards, which could be used in ATMs. The indictment states that they would sell off American cards for $10, Canadian numbers for $15 and European cards for $50. The scheme ran from 2005 through 2012.