# D3FEND

> D3FEND is a MITRE cybersecurity knowledge graph that describes defensive techniques, the artifacts they act on, and their relationships to offensive tactics and techniques.

This document provides concise pointers to the public D3FEND site. Each list item uses the format [Name](URL): notes.

## Primary entry points

- [Home](https://d3fend.mitre.org/): D3FEND matrix, showing D3FEND tactics, techniques, and subtechniques.
- [Domains](https://d3fend.mitre.org/domain/): browse domains (D3FEND for OT, D3FEND for Space).
- [D3FEND for OT](https://d3fend.mitre.org/domain/ot): D3FEND OT expansion, techniques and artifacts specific to OT systems.
- [CAD](https://d3fend.mitre.org/cad/): Cyber Attack Defense (CAD) Tool for building, visualizing, and testing D3FEND graphs using the D3FEND ontology.
- [Artifacts](https://d3fend.mitre.org/dao/): catalog of digital artifacts (systems, logs, configurations, etc.) that D3FEND defensive techniques operate on or produce.
- [Taxonomies](https://d3fend.mitre.org/taxonomies/): hierarchical sub-taxonomies of D3FEND concepts and related security knowledge bases.
- [About](https://d3fend.mitre.org/about/): background on the D3FEND project, sponsors, scope, and methodology.
- [Resources](https://d3fend.mitre.org/resources/): reference materials, documentation, and external links for learning and integrating D3FEND.
- [Contribute](https://d3fend.mitre.org/contribute/): information on how to propose changes, contribute mappings, and engage with the D3FEND team.
- [FAQ](https://d3fend.mitre.org/faq/): frequently asked questions about D3FEND concepts, usage, and licensing.
- [Blog](https://d3fend.mitre.org/blog/): articles, announcements, and deep dives related to D3FEND and defensive cyber operations.
- [Search](https://d3fend.mitre.org/search/): site-wide search across D3FEND techniques, artifacts, domains, mappings, and documentation.
- [API Docs](https://d3fend.mitre.org/api-docs/): D3FEND API documentation of common routes, parameters, and outputs.