OAuth 2.0 + PKCE Explained: Authentication, Tokens & Security | API Authentication

OAuth 2.0 tutorial with PKCE — learn how Google Sign-In works using the Authorization Code Flow, Access Tokens, and Refresh Tokens. This OAuth 2.0 + PKCE explained video covers the complete authentication flow step-by-step.

In this OAuth 2.0 tutorial, we break down OAuth 2.0 Authorization Code Flow with PKCE, token exchange, scopes, consent screen, and real-world API security best practices.

🔐 What you’ll learn:
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00:00 — Why OAuth 2.0 Exists
00:20 — OAuth Explained with Analogy
01:31 — Authorization Code Flow (Core Concept)
03:02 — PKCE Explained (Security Upgrade)
04:30 — OAuth Grant Types Overview
05:39 — Access Token vs Refresh Token
06:30 — Google Sign-In Full Flow
07:30 — OAuth Security Mistakes
08:15 — Security Checklist
08:42 — What’s Next (OpenID Connect & SSO)

💡 Topics Covered:
• OAuth 2.0 tutorial (complete guide)
• OAuth 2.0 Authorization Code Flow with PKCE
• PKCE explained (Proof Key for Code Exchange)
• Google Sign-In OAuth flow
• Access Token vs Refresh Token
• API Authentication & Authorization
• OAuth security best practices
• Implicit Flow deprecation
• OpenID Connect basics

📺 API Authentication Series:

▶️ Part 1: API Authentication — Basic Auth, Bearer Tokens & JWTs
Watch here: https://youtu.be/bP1mo3UbhNg

▶️ Part 2: OAuth 2.0 + PKCE (You are here)

▶️ Part 3: OpenID Connect + SSO (Coming Soon)

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#OAuth2 #OAuthTutorial #PKCE #AuthorizationCodeFlow #GoogleSignIn #APISecurity #WebSecurity #AccessToken #RefreshToken #JWT #OpenIDConnect #SSO #Authentication #Authorization #WebDevelopment

Видео OAuth 2.0 + PKCE Explained: Authentication, Tokens & Security | API Authentication канала CsMadeEz