Security Architecture

Security architecture is the discipline of designing systems that protect data, services, and users from unauthorized access, tampering, and disclosure. In system design, security is not a feature added at the end -- it is a set of constraints and patterns woven into every layer of the architecture, from network boundaries to application logic to data storage.

Modern systems face threats ranging from credential theft and injection attacks to supply chain compromises and insider threats. A well-designed security architecture applies defense in depth: multiple overlapping controls so that no single failure leads to a full breach. Understanding authentication, encryption, trust boundaries, and API protection is essential for building systems that users and organizations can rely on.

What You'll Learn

• Authentication & Authorization - Verifying user identity and enforcing access control through mechanisms like OAuth 2.0, OpenID Connect, JWTs, session management, and role-based or attribute-based access control.
• Encryption & Data Protection - Protecting data at rest and in transit using TLS, symmetric and asymmetric encryption, key management, hashing, and secrets management practices.
• Zero Trust Architecture - Moving beyond perimeter-based security to a model where every request is verified regardless of network location, using mutual TLS, identity-aware proxies, and micro-segmentation.
• API Security - Securing APIs through rate limiting, input validation, authentication tokens, CORS policies, and protection against common attack vectors like injection, CSRF, and broken access control.

Prerequisites

A foundation in networking (TCP/IP, HTTP, TLS), basic cryptography concepts, and web application architecture will be helpful. Familiarity with API design and distributed systems fundamentals is also recommended.