Chief of credit card processing company whose computer system was penetrated by data thieves, exposed 40 million cardholders to a risk of fraud. John M. Perry, chief executive of CardSystems Solutions, indicated that the records known to have been stolen covered roughly 200,000 of the 40 million compromised credit card accounts, from Visa, MasterCard and other card issuers. He said the data was in a file being stored for “research purposes” to determine why certain transactions had registered as unauthorized or uncompleted.”]
Source: https://www.csoonline.com/article/2119413/lost-credit-data-improperly-kept–company-admits.html