What is OAuth 2.0?
OAuth 2.0 is an authorization framework that enables applications to obtain limited access to user accounts on third-party services, used for 'Login with Google/GitHub' features.
OAuth 2.0 Explained
OAuth 2.0 is the industry-standard authorization protocol that powers 'Login with Google,' 'Sign in with GitHub,' and similar features across the web. It allows users to grant third-party applications limited access to their accounts without sharing passwords. OAuth 2.0 defines four grant types for different scenarios: Authorization Code (web apps), Implicit (legacy SPAs), Client Credentials (server-to-server), and Resource Owner Password. At M3L Software, we implement OAuth 2.0 for social login integration, API authorization, and third-party service connections. Our implementations follow security best practices including PKCE for public clients, state parameters for CSRF protection, and proper token storage.
Key Features
Common Use Cases
Frequently Asked Questions
OAuth vs JWT—what's the difference?
OAuth is an authorization framework (a process for granting access). JWT is a token format. OAuth often uses JWTs as its token format. They're complementary, not alternatives.
How does 'Login with Google' work?
It uses OAuth 2.0: your app redirects users to Google, they approve access, Google redirects back with an authorization code, your server exchanges the code for tokens, and you get the user's profile information.
Is OAuth 2.0 secure?
Yes, when implemented correctly. Use HTTPS everywhere, validate redirect URIs, implement PKCE for public clients, use state parameters for CSRF protection, and store tokens securely.
Related Terms
JWT
JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties, commonly used for API authentication and authorization.
Read moreAPI
An Application Programming Interface (API) is a set of rules and protocols that allows different software applications to communicate with each other, enabling data exchange and functionality sharing.
Read moreREST API
A REST API (Representational State Transfer) is an architectural style for building web APIs that uses standard HTTP methods (GET, POST, PUT, DELETE) to perform operations on resources identified by URLs.
Read moreFastAPI
FastAPI is a modern, high-performance Python web framework for building APIs, known for its speed, automatic documentation, and type-hint-based validation using Pydantic.
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