As millions of bargain-crazed customers swarmed through Target stores on Black Friday, one of the most audacious heists in retail history was quietly underway.
A band of cyberthieves pilfered credit and debit card information from the giant retailer's customers with pinpoint efficiency as shoppers bought discounted sweaters and electronic gear on the unofficial launch of the holiday shopping season.
By the time the scheme was discovered, the unidentified hackers had made off with financial data of 40 million Target customers over a 21/2-week period. It ranks as one of the nation's biggest retail cybercrimes on record.
Target disclosed the security breach Thursday,...