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Security Intermediate

What is OAuth 2.0?

An authorization framework that allows third-party applications to access user resources without sharing passwords.

OAuth 2.0 enables delegated authorization. Instead of sharing credentials, users authorize applications to access specific resources. The framework defines roles: resource owner (user), client (app), authorization server, and resource server.

Grant types include Authorization Code (web apps), Client Credentials (service-to-service), and Device Code (smart TVs). OAuth 2.0 is used by Google, Facebook, GitHub, and most major platforms for third-party access.

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