Since Visa mandated the Cardholder Information Security Program (CISP) and MasterCard International introduced its Site Data Protection (SDP) program, many merchants, processors, and acquiring banks have been working diligently to meet their specific requirements. Today's Payment Card Industry Data Security Standard (PCI DSS), which combines requirements of the Visa and MasterCard programs, remains as one of the preeminent achievements in the information security industry. As a leading provider of PCI assessments and supporting security services, the VeriSign Global Security Consulting team has performed several hundred PCI assessments since the program's inception. The requirement failures and actual compromises that have observed during these assessments exhibit common themes. This paper identifies proven tactics that help companies achieve PCI compliance and, more importantly, avoid compromise.
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