T0Offensive Security Fundamentals
Defense in depth
The defender's core strategy of layered, independent controls so that no single failure is fatal, and why it is also the lens an attacker and a good report use to prioritise.
Intermediate3 min readassociate streamUpdated Sat Aug 01 2026 00:00:00 GMT+0000 (Coordinated Universal Time)
Learning objectives
- Explain defense in depth and why control independence is the crucial property.
- Name the common defensive layers and what each contributes.
- Explain why attackers hunt for missing or non-independent layers.
- Frame findings around a missing layer, and use AI to reason about layers without overtrusting it.
Academy subscription
Subscribe to unlock this module
This module is part of the StrikeOps Academy subscription. Unlock every paid module, with hands-on labs and knowledge checks.
- Every paid module across all tracks
- Hands-on labs and knowledge checks
- New content as it ships
$59/ month · or $590 / year
The Reference library and Foundation starters are free to read now.