Security Architecture: "Decoded: The Cybersecurity Podcast," focuses on the foundations of security architecture. This introductory material defines four essential principles for building secure systems, beginning with the crucial CIA Triad: Confidentiality, Integrity, and Availability. The script also clarifies the fundamental terminology of security, explaining how threats exploit vulnerabilities, which creates risks. Furthermore, the material introduces the strategic concept of Defense in Depth, illustrating it as a system of layered controls, akin to the barriers of a medieval castle or the layers of an onion. Finally, the text enumerates key security models and standards, such as NIST, ISO/IEC 27001, and SABSA, which serve as necessary frameworks for security professionals.