Defence in Depth - Brief Introduction
Defence in Depth (Without the Jargon)
Defence in depth is the idea that no single security control is enough. Instead of relying on one tool or one decision to keep everything safe, you build multiple layers of protection around your environment.
The key assumption is simple: each layer assumes the previous one will fail.
The goal isn’t to make attacks impossible. That’s not realistic.
The goal is to make attacks expensive, detectable, and recoverable.
