OAuth 2.0 Made Simple
A Practical Guide to Secure Authorization for APIs, Web, and Mobile Apps
Modern applications rely on secure authorization—and OAuth 2.0 has become the industry standard for protecting APIs, web applications, and mobile apps. Yet many developers struggle to understand how OAuth actually works.
OAuth 2.0 Made Simple: A Practical Guide to Secure Authorization for APIs, Web, and Mobile Apps is written to remove that confusion.
This book explains OAuth 2.0 from the ground up, starting with why it exists and how it differs from traditional authentication methods. You’ll learn the core concepts behind OAuth roles, tokens, scopes, and consent, followed by a clear explanation of the most important authorization flows, including Authorization Code Flow, PKCE, and Client Credentials Flow.
Rather than focusing on abstract theory, this book emphasizes real-world usage. You’ll see how OAuth 2.0 is applied in web applications, mobile apps, APIs, and microservices, along with common mistakes and security best practices developers should follow.
The book also introduces OpenID Connect and clearly explains how it differs from OAuth 2.0, helping you understand when authorization is enough and when authentication is required.
Designed for beginners and intermediate developers, OAuth 2.0 Made Simple is ideal for anyone who wants a clear, practical, and trustworthy guide to modern authorization.