Citigroup Inc said it has been

The security breach is just the cheap gucci wallets latest in a long string of incidents that have put the personal information of millions of credit and debit cardholders at risk. Individual banks and processors said they louis vuitton wholesale had not yet determined the full extent of the breach, but the blog Krebs on Security, which first reported the breach, said it was "massive" and could affect more than 10 million cardholders. Some industry experts suggested the figure might be much lower, perhaps on the order of tens of thousands. Bernstein Research analyst Rod Bourgeois Hot sale lv bagups silvery for lady 2012 new come online fashion noted that Global Payments is a relatively small player in the transactions services industry, servicing 800,000 merchants with a 3.5 percent market share. By contrast, the largest competitor, First Data, services millions of merchants, with 22.6 percent of the market. JPMorgan Chase & Co, as well as American Express and cheapest louis vuitton bagups outlet womens 2012 sale online cute Discover, which issue their own cards, said they are monitoring customers' accounts and would issue new cards to anyone whose information may have been compromised. Citigroup Inc said it has been notified by processors fashion louis vuitton bagups outlet discount new arrival sale silvery of the breach. Bank of America Corp declined to comment on the matter and Wells Fargo & Co said it was too early to comment on the impact. Banks and processors emphasized customers would not be held liable for any fraudulent charges that may occur. Michael Simonsen, chief executive of real-estate research company Altos Research, said he may have been a victim.