Target Must Face Bank Suits Over Customer Data Breach

Target Corp. must defend itself against claims that its failure to shield computer systems allowed hackers to steal the account data of millions of shoppers, forcing banks to reimburse fraudulent charges and issue new credit and debit cards.

At least 40 million credit cards were compromised and personal information including e-mail addresses and phone numbers of as many as 110 million people may have been stolen in the incursion last year, the Minneapolis-based retail chain has said.