P.F. Chang's is investigating claims that thousands of credit and debit card numbers were stolen from restaurant locations across the U.S. between March and May.
The breach was first noticed when information related to thousands of cards popped up on the same online black market where stolen Target cards were sold last year, according to security expert Brian Krebs. If confirmed, it would be the largest breach since March, when 200,000 card numbers stolen from Sally Beauty were put up for sale.
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