My previous post looked at producing a C4 model for my (simple) website. This post takes that a step further and looks at how we can use C4 modelling to elicit security and privacy threats using two frameworks: STRIDE. Most people know STRIDE, it’s derived from the Microsoft security threat modelling process from the early 2000s and represents Spoofing, Tampering, Repudiation, Information leakage, Denial of service and Elevation of privilege. LINDDUN.

This site has been around for a few years now and has changed significantly, mainly from an infrastructure perspective, over that time. That can be done as the site gets very few hits so I can use it to test features and experiment without worrying about outages.‌ In a work context, I very much promote the use of C4 modelling as a consistent and clear means of expressing a system architecture.