# Part 4 - The OAuth Authorization Server
OAuth Simplified 4 / 4
24 min read
How the Authorization Server registers clients, issues Authorization Codes and tokens, enforces PKCE, and what it stores and checks at every step.
/ tags/ Authentication
# Part 1 - Introduction To OAuth
OAuth Simplified 1 / 4
10 min read
Why OAuth exists, the four components it introduces, and how delegating access works without ever handing over your password.