OAuth 2.0 & OIDC
API Security Specialist
Simple
OAuth 2.0 & OIDC is a building block of "API Security Specialist". In plain terms: rest, graphql, oauth/oidc, jwt hardening, rate limits, and api gateway patterns. This topic focuses specifically on oauth 2.0 & oidc and the core ideas you need to understand it.
Technical
Technically, OAuth 2.0 & OIDC involves the mechanisms, data structures and protocols that underpin api security specialist. You will study how it is implemented, how it is configured, how it fails, and how its behavior shows up in logs, traffic or code.
Why it matters
APIs dominate modern apps; BOLA and auth flaws are the top breach class.
Example
In a real organization, professionals working in appsec, api platforms, bug bounty, backend engineering. rely on oauth 2.0 & oidc to make decisions — for example, explaining an alert, hardening a system, or writing a finding in a report.
Practice idea
Build a small lab in a VM and experiment with oauth 2.0 & oidc using the related tools below. Document what you observe.
Deep dive
Read the official documentation and relevant RFCs/standards for OAuth 2.0 & OIDC. Explore edge cases, internals, and how attackers and defenders view it differently.