A hacker break-in at credit and debit card processor Global Payments Inc. dates back to at least early June 2011, Visa and MasterCard warned in updated alerts sent to card-issuing banks in the past week. The disclosures offer the first additional details about the length of the breach since Global Payments acknowledged the incident on March 30, 2012. Visa and MasterCard send periodic alerts to card-issuing banks about cards that may need to be re-issued following a security breach at a processor or merchant. Indeed, it was two such alerts — issued within a day of each other in the final week of March — which prompted my reporting that ultimately exposed the incident. Since those initial alerts, Visa and MasterCard have issued at least seven updates, warning of additional compromised cards and pushing the window of vulnerability at Global Payments back further each time.