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auth-implementation-patterns

Master authentication and authorization patterns including JWT, OAuth2, session management, and RBAC to build secure, scalable access control systems. Use when implementing auth systems, securing APIs, or debugging security issues.

Authentication & Authorization Implementation Patterns

Build secure, scalable authentication and authorization systems using industry-standard patterns and modern best practices.

When to Use This Skill

Implementing user authentication systems
Securing REST or GraphQL APIs
Adding OAuth2/social login
Implementing role-based access control (RBAC)
Designing session management
Migrating authentication systems
Debugging auth issues
Implementing SSO or multi-tenancy

Core Concepts

1. Authentication vs Authorization

Authentication (AuthN): Who are you?

Verifying identity (username/password, OAuth, biometrics)
Issuing credentials (sessions, tokens)
Managing login/logout

Authorization (AuthZ): What can you do?

Permission checking
Role-based access control (RBAC)
Resource ownership validation
Policy enforcement

2. Authentication Strategies

Session-Based:

Server stores session state
Session ID in cookie
Traditional, simple, stateful

Token-Based (JWT):

Stateless, self-contained

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Auth Implementation Patterns

Authentication & Authorization Implementation Patterns

When to Use This Skill

Core Concepts

1. Authentication vs Authorization

2. Authentication Strategies

Detailed patterns and worked examples

Best Practices

Common Pitfalls