I was asked the other day if getting a PCI Compliant Website Security Scan from Trust Guard was all I needed to do to acheive PCI Compliance. The answer is no – heck no!  There are several aspects of PCI Compliance that the Security Standards Council has created through their Data Security Standard.  Vulnerability Scanning from Trust Guard is just one area of compliance as outlined by the payment card industry.  To see other areas of need, you can look at this chart, or this page on passwords, or here for a PCI Compliance Table.  You can also read the book: Acheiving PCI Compliance: A Guide For Understanding And Complying With Data Security Standard For Merchant Levels 2, 3, and 4.