Included on the list are Fujitsu, MenuSoft, Micros, Posera, POSitouch and Radiant Systems applications. Several other restaurant POS providers also are on the list.
Posera began working on their validated software payment application in 2005.
"It's something we absolutely had to do," said Shannon Arnold, marketing director for Posera Software Inc., creator of the Maitre'D software solution. "It really helps us give the tools to our customers so they can protect themselves."
That protection includes having a POS that drops secure customer data after a payment has been made.
Host and remote POS security
The second POS system vulnerability on Visa's list of the top three is host security: the POS system's ability to store sensitive cardholder data.
"While you may operate in a face-to-face environment, fraudsters may be trying to target face-to-face transactions because of the magnetic-stripe data," Martin said. "The merchant should not be storing data; however, where vulnerability comes into play is where some POS systems are inadvertently storing data after the authorization period. And merchants may have a cache of data they didn't know they had."
TOP Three POS vulnerabilities |
 | Remote access security: Accessing the POS from a home office or other outside source. |  | Host security: Consolidating and retaining important cardholder data. |  | Network security: The monitoring of POS network activity. |
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Case in point: Denver-based Chipotle Mexican Grill. Before August 2004, Chipotle had a possible breach of customer-card data. The theft led to 2,000 cases of fraudulent charges, totaling $1.4 million.
Although company executives could never determine the thefts occurred, they did determine its POS had been retaining track data, despite their thinking otherwise. Chipotle was subsequently fined nearly $1.3 million by Visa and MasterCard.
Michel Cote, Posera's vice president, said cardholder data such as the credit card number and expiration date should not be kept by a restaurant's POS system. He also said changes to POS software mandated by credit card companies did not come as a surprise.
"Information security is something that is very important for us and our customers. So, (the regulations) did not require many changes for our software to be compliant," he said.
Posera's software compliance, and the software applications of other validated suppliers, is tracked yearly by Visa, which means even if compliant software hasn't been changed a letter must be sent stating that fact.
"It's difficult for us to know if every restaurant has a validated network, but we do send information to distributors to ensure they are compliant," said Cote.
In addition to host and remote-access security, having a secure network is the third POS vulnerability.
Visa says adequate POS security controls should be implemented to ensure the network is properly configured and a basic level of activity logging must be maintained.
According to their risk mitigation strategy, restaurant environments that process or transmit data must do so in accordance to the PCI data security standard. But while a majority of fast casual and other restaurant merchants have not had any security breaches, the threat is always out there.
** Click here to learn more about PCI compliance and POS system best practices.