Unauthorized computer programs, secretly installed on servers in Hannaford Brothers supermarkets compromised up to 4.2 million debit and credit cards... PORTLAND, Maine (AP) -- Unauthorized software that was secretly installed on servers in Hannaford Bros. Co.'s supermarkets across the Northeast and in Florida enabled the massive data breach that compromised up to 4.2 million credit and debit cards, the company said Friday...The Scarborough, Maine-based grocer confirmed a report in The Boston Globe that it told Massachusetts regulators this week about the link between the breach and the illicit programs, known as "malware." The company doesn't know how the malware -...