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Cybersecurity
Authentication & Authorization: OAuth, JWT, and Security
Implement secure authentication. OAuth 2.0, JWT tokens, session management, and identity providers.
Seena Singh 14 min readFebruary 11, 2025
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.
AuthenticationOAuthJWT
Next step
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