Through October 29, 2008, Trustwave’s forensics practice has investigated 443 cases of cardholder data compromise. The information contained within this article is the culmination of almost seven years of card compromise investigations.
Key Developments in 2008: The Theft of Cardholder Data in Transit
In 2008, the most notable development in payment card compromises is the theft of cardholder data at rest (stationary on a system component) to its theft in transit (moving through a system). Trustwave experts have noted that attackers, are stealing data in real-time by eavesdropping on a certain device and stealing the data as it passes to or through a particular system rather than stealing data that is stored on that system.
One example of this is an attackers’ use of unauthorized applications—referred to as malware—that steals cardholder data from a computer’s Random Access Memory. What’s perhaps most unsettling about the trend is that a merchant can use a payment application that complies with the Payment Application Data Security Standard (PA-DSS) or Visa’s Payment Application Best Practices (PABP), but still fall victim to a compromise.
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