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Authentication & Authorization: OAuth, JWT, and Security

Implement secure authentication. OAuth 2.0, JWT tokens, session management, and identity providers.

Rottawhite Team14 min readFebruary 11, 2025

AuthenticationOAuthJWT

Authentication vs Authorization

Authentication verifies identity; authorization controls access.

OAuth 2.0

Flows

Authorization Code

Client Credentials

Implicit (deprecated)

PKCE

Tokens

Access tokens

Refresh tokens

ID tokens (OIDC)

JWT

Structure

Header

Payload

Signature

Best Practices

Short expiration

Secure storage

Token rotation

Session Management

Cookie-based

Token-based

Hybrid approaches

Identity Providers

Auth0

Clerk

Firebase Auth

Keycloak

Conclusion

Secure authentication is foundational to application security.

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