What changes after this module
Reduce blast radius by limiting what is reachable, what is trusted, and how far compromise can travel.
Outcome promise
- Explain zero-trust thinking as controlled access and reduced assumptions.
- Choose one practical way to reduce exposure or lateral movement.
Core model
Use the diagram and terms below as the minimum model you should be able to explain after this module. If you cannot explain the model in plain language, pause here before you move on.
Key terms
- Blast radius
- How far damage can spread after one failure or compromise.
- Segmentation
- Separating systems or access zones so compromise does not travel freely.
Check yourself
Answer the prompt before you reveal the check. If you cannot answer it in your own words, revisit the model and the terms once more.
Quick check
What is the practical goal of zero-trust thinking?
Reveal the answer check
Reduce automatic trust, verify context continuously, and limit how much damage a single compromise can cause.
Reflection and evidence
Keep the evidence small. One honest reflection and one small artefact is enough to show that the learning changed how you describe, check, or design something.
Reflection prompt
Which connection, privilege, or assumption in your environment creates an unnecessarily large blast radius?
Artefact
An exposure-reduction note with one trust assumption to remove or limit.
Optional deeper practice
Use the workspace to redraw one access flow with tighter segmentation or smaller privilege boundaries.
Move through the course
Keep the flow predictable. Stay with the stage sequence unless you have a clear reason to jump around.