Authentication System Design

Design secure and scalable authentication systems following industry best practices and security standards.

Quick Reference

Authentication Method Selection

• Session-based: Traditional web apps, server-side control
• JWT Token: SPA/mobile/microservices, stateless
• OAuth 2.0: Third-party integration, standard protocols
• OpenID Connect: Identity + authentication

JWT Claims Structure

• Standard: iss, sub, aud, exp, nbf, iat, jti
• Custom: userId, roles, permissions

Decision Workflow