We had a feeling that Square wouldn't let VeriFone call it out without issuing some sort of statement, and CEO Jack Dorsey has responded to the claims of a gaping security hole in the form of an open letter on the company's website. Dorsey calls its competitor's accusations "not fair or accurate" and says that many of the necessary security measures are already built-in to your credit card itself. He also points out that this sort of credit card number thievery is possible every time you hand your plastic over to a waiter or salesperson, and that its partner bank, JPMorgan Chase, stands behinds all aspects of the se
