P.F Chang's is investigating a potentiality data hack, when credit cards showed up on an underground website that criminals use. Brian Krebs broke the story, when the banks he contacted confirmed that the cards had been used at P.F Chang's restaurants. P.F Chang's is investigating the allegations currently with authorities.UPDATE (06/30/2014): PF Chang's has had a category sue lawsuit filed against the restaurant chain. The companion confirmed on June 12, 2014 that a hack had occured. Some experts believe that the lawsuit is unlikely to succeed because some security experts make said, because proving consumer losses linked to the specific restaurant data cut is difficult to do.Some believe it was a hack of the restaurants POS system, most likely infiltrated by malware, similar to the mark and Salley Beauty hackes, the restaurant string has yet to divulge any details, including the number of cards exposed. UPDATE (8/4/2014): P.F Chang's China Bistro Ltd. stated Monday that the data hack that affected customer credit and debit cards affected 33 locations throughout the continental U.S., the investigatin is relieve ongoing.