STIX and TAXII Introduction Guide

**STIX** (a standardized language for describing threats) and **TAXII** (a protocol for securely exchanging that data) enable fast, interoperable threat intelligence sharing; this guide explains their roles, common use cases, and how to get started using open-source tools like cti-taxii-server, OpenCTI, and MISP, including methods to convert reports into STIX and subscribe to TAXII feeds. It also summarizes STIX Domain Objects (e.g., Indicator, Malware, Threat Actor) and discusses benefits (rapid sharing, automation) and adoption challenges (complexity, data quality, resources).