CDA.Wiki is the cybersecurity knowledge base built by Cyber Defense Army. It is free, comprehensive, and maintained by security practitioners who operate in the field every day.
CDA.Wiki is an open-access cybersecurity encyclopedia. It covers the full spectrum of cybersecurity: frameworks and standards, threat actors and attack techniques, compliance regulations, defensive tools, operational methodologies, career guidance, and the history of the field.
Every article is organized by category, mapped to a defense domain in the Planetary Defense Model (PDM), and rated by difficulty level. This structure lets you navigate the knowledge base whether you are a career-changer reading your first article or a seasoned architect looking for operational depth.
The wiki integrates with the broader CDA ecosystem. Articles link to related missions in Theater, courses in the CDA Institute, and active threat intelligence from CDA.Now. Knowledge is not isolated here; it feeds directly into operations.
The cybersecurity industry has a knowledge problem. Information is scattered across vendor blogs with hidden agendas, outdated textbooks, paywalled research, and social media hot takes. There is no single, neutral, practitioner-grade reference that covers the field end to end.
CDA.Wiki fills that gap. We built the resource we wished existed when we were learning this field, and the reference we still need as practitioners working in it every day.
It is free because cybersecurity knowledge should not be gated. The more people who understand how to defend systems, networks, and data, the better the entire ecosystem becomes. This is not charity; it is strategy.
Every article is reviewed by cybersecurity practitioners. We cross-reference primary sources, RFCs, vendor documentation, and threat intelligence feeds.
We do not write abstract theory. Every article connects to real-world operations, with practical guidance defenders can apply immediately.
Articles are mapped to the Planetary Defense Model, placing each topic in context within the six concentric defense domains.
Every article is classified as Beginner, Intermediate, Advanced, or Expert. Know before you read whether the content matches your experience level.
Cybersecurity moves fast. Articles are versioned, tracked, and updated as frameworks evolve, threats change, and regulations are revised.
Articles link to related topics, relevant CDA missions, and Institute courses. No knowledge lives in isolation.
CDA.Wiki exists to educate. We explain technologies, threats, frameworks, and techniques objectively. Our proprietary methodologies are documented, but they are explained alongside the industry standards they build upon.
We would rather have 100 excellent articles than 10,000 shallow ones. Every topic gets the space it needs: historical context, technical detail, operational impact, and forward-looking analysis.
Articles are written for people who do the work. SOC analysts, penetration testers, security engineers, CISOs, compliance officers. The writing is direct, the examples are real, and the advice is actionable.
Complex topics need clear explanations. We break down how things work at a fundamental level before layering on advanced concepts. A beginner should leave understanding the concept; an expert should leave with a new operational angle.
Every article includes a CDA Perspective section that maps the topic to the Planetary Defense Model, identifies which domain it falls under, and explains how CDA approaches the problem operationally.
Every article in CDA.Wiki is mapped to one of six defense domains in the Planetary Defense Model. This gives readers immediate context for where a topic fits in the broader cybersecurity landscape.
Data Protection & Sovereignty
The vault. What you're protecting.
Vulnerability & Surface Defense
The walls. Where attackers probe.
Security Posture & Hygiene
The garrison. Daily operations.
Identity Access & Trust
The gates. Who gets in.
Threat Intelligence & Defense
The scouts. What's coming.
Risk Governance & Assurance
The command tent. Strategic oversight.
CDA.Wiki is maintained by Cyber Defense Army, a cybersecurity operations company. We secure organizations through missions, not monitoring.