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MasterCard, Visa warn of possible security breach
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MasterCard, Visa warn of possible security breach

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MasterCard, Visa warn of possible security breach

(Reuters) - MasterCard Inc, Visa Inc and Discover Financial Services have been victims of a potential security breach, the latest in a string of incidents that have put the personal information of millions of credit cardholders at risk.

The companies -- the first, second and fourth largest global credit card processors, respectively -- said the issue stemmed from a third-party vendor and not their own internal systems.

It is unclear just how large of a breach this is and how many customers might be affected.

MasterCard and Visa said they have notified banks about the security breach. Discover said it is monitoring accounts for suspicious activity and will reissue cards "as appropriate."

Following news of the breach, shares of Atlanta-based Global Payments Inc, which acts as a credit-checking middleman between merchants and card processors, were halted after dropping more than 9.1 percent. A representative did not immediately return a request for comment.

Visa shares were down 57 cents at $118.43 and MasterCard shares were down $3.32 at $424.90 in afternoon trading.

MasterCard said it notified law enforcement officials and has hired an independent data-security organization to review the possible breach. A U.S. Secret Service spokesman said it was investigating but declined to give any specifics about the breach.

"MasterCard is concerned whenever there is any possibility that cardholders could be inconvenienced and we continue to both monitor this event and take steps to safeguard account information," the company said in a statement. "If cardholders have any concerns about their individual accounts, they should contact their issuing financial institution."

Visa said it provided banks with affected customers' account numbers and emphasized that customers are not responsible for fraudulent purchases.

The companies' statements came after the blog KrebsonSecurity reported that MasterCard and Visa have been alerting banks across the U.S. about a "massive" breach that may affect more than 10 million cardholders. The report said accounts were compromised between January 21, 2012 and February 25, 2012.

JPMorgan Chase & Co said it has been notified of the breach and is monitoring affected customers' accounts.
A Wells Fargo spokeswoman said it was too early to comment on whether the bank's customers were affected by the breach.

Representatives of other big debit and credit card issuers, including Bank of America Corp and Citigroup Inc, as well as third-largest card processor American Express Co, either declined to comment on the matter or did not immediately respond to inquiries.

Thousands of U.S. banks that issue credit and debit cards receive daily alerts regarding breaches through a system referred to as CAMS, said Thomas McCrohan, an analyst with Janney Capital Markets.

Once a person swipes a card to pay, the transaction is sent through a chain of processing.
The account number, expiration date and possibly the cardholder's name is sent from the point of payment to a processor which then connects to Visa or MasterCard. Information is then sent to the card issuer — a bank — which ultimately authorizes the transaction.

The actual transfer of money occurs later.
The information that was likely collected illegally is called Track 1 and Track 2 data. A person improperly using the information can transfer the account number and expiration date to a magnetic strip on a card and then try to use the card on a website.

Those transactions are aggregated and sent to a server, said Avivah Litan, security analyst at Gartner Research, but "it has a lot of hops along the way" before the card information reaches a processor.

The illegal use of the data could be stymied if an online merchant asks for the three or four digits printed on a card known as the "CVV code."

Processing companies, which perform millions of authorizations each day, are also supposed to encrypt card information. But a breach could occur if someone gains access to the system and identifies a gap in the encryption.

"The systems can all be made tighter, but if they're too tight no transactions would ever be approved," said Edward Lawrence, a director at Auriemma Consulting Group, a payment systems consultant. "You still have to allow commerce to occur."

The Visa-Mastercard-Discover breach is the first major instance this year of consumer information put at risk by technological flaws or hacking, but there are plenty of examples of massive data breaches in recent years affecting banks, retailers, technology companies and payment processors.

Last June, Citigroup said computer hackers breached the bank's network and accessed data of about 200,000 cardholders in North America.

Sony Corp also reported several recent attacks, including one last year in which hackers accessed the personal information on 77 million PlayStation Network and accounts.

Google Inc suffered a major attack on its Gmail accounts in 2011 that it said appeared to originate in China, and companies including TJX Companies Inc and Heartland Payment Systems Inc have also had their systems compromised.

"The fact that there has been another breach at a credit card processor shouldn't come as a great surprise," said Geoff Webb of data protection company Credant Technologies. "Credit card thieves are constantly looking for opportunities to identify and attack sites where there is a weakness in security."

MasterCard, Visa warn of possible security breach | Reuters

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