Demo Concept · mocked data

Learn security by patching code, not by memorising categories.

Learn, practise and track security — for developers

Five-step lessons that end in a patch

Checks sit inside each step, never bundled at the end. The “fix it” step is mandatory.

Attack mechanics with a diagram, runnable examples, real incidents, three defence layers, verification, tiered sources.

Every item says why you're seeing it and links straight back to the lesson.

A topic × level matrix instead of a radar chart — it tells you what to do next.