WhiteHat CEO Stephanie Fohn says that you need her company's service if you've got a Web site that takes transactions. WhiteHat is a SaaS vendor that offers black-box penetration tests for Web sites.

For most organizations, ferreting out e-commerce site flaws calls for every technique from element testing and hard core code reviews, to a range of tools that help assess code quality and that test site vulnerability.

At the highest end, there are consultants who will both provide penetration testing and review code. They're also by far the most expensive. WhiteHat says it's captured the best of both worlds with its service. Here's CEO Fohn explaining the service.

From what we can tell, this is relatively high-end stuff, including testing services for PCI 6.6. It's a little concerning that the company won't mention a single reference customer, but for sites that are constantly changing, it's an interesting option.