Authentication Roadmap

Note: Not all questions may match a certain category on the roadmap.

Authentication Basics
Concepts
What is authentication? ->
Authentication vs. Authorization ->
Principles of secure authentication ->
Authentication Mechanisms
Concepts
Password hashing and salting
Session-based authentication
Token-based authentication
Single sign-on (SSO)
Two-factor authentication (2FA)
Understanding OAuth 2.0 and OpenID Connect
Identity and Access Management (IAM)
Concepts
What is IAM?
Users, roles, permissions
Access control models (ACLs, RBAC, PBAC)
Identity federation
IAM Protocols and Standards
Scalability and Performance
Concepts
Distributed authentication systems
Load balancing
Caching strategies
Rate limiting
API security best practices