PCI Security Standards Council
The Payment Card Industry (PCI) Security Standards Council website isn’t a security website per se, but it is full of very useful and helpful security information related to the most far-reaching and comprehensive industry security standard today — the PCI Data Security Standard (DSS). PCI DSS is applicable to any organization that processes, transmits, or stores payment card data — whether it handles one transaction or one million transactions — so it is very likely that your organization or your clients are subject to or affected by PCI DSS in some way.
Check out the PCI Standards and Documents, Training, and News and Events tabs on the PCI website for useful resources such as incident response templates, self-assessment questionnaires, WiFi security guidelines, encryption and tokenization information, and secure virtualization tips. These resources are specific to PCI DSS, but since most data protection standards and regulations are based on security best practices, this isn’t a bad place to go for good security information.