OAuth 2.0 Security Fundamentals: Learn by Identifying Vulnerabilities

Securing modern applications requires a deep, conceptual understanding of how delegation and identity protocols work under the hood. This text-based course guides you through the core principles of OAuth 2.0 and OpenID Connect, showing you how to build secure architectures by analyzing where they commonly fail. You will transition from understanding basic token flows to implementing robust, production-ready authorization systems. By reading through clear explanations and architectural breakdowns, you will learn to spot misconfigurations and defend your applications against real-world security threats. What you'll learn: - Understand the core roles, grant types, and token flows of OAuth 2.0 and OpenID Connect - Identify common architectural vulnerabilities, implementation flaws, and security risks - Configure secure token validation, storage, and scope management strategies - Apply modern security best practices, including PKCE (Proof Key for Code Exchange) and state parameters - Protect resource APIs against token leakage, replay attacks, and unauthorized access The course begins with foundational concepts, defining key terminology, grant types, and the security model of modern delegation. You will then progress through detailed text-based scenarios that illustrate vulnerable implementations and how to patch them effectively using modern industry standards. This course is designed for beginner to intermediate software developers, system architects, and security enthusiasts who want to master authorization security from scratch. No prior experience with OAuth 2.0 is required. Start reading today to build secure, identity-aware applications with confidence.