00 — Overview
How Authentication Works
Understand how websites verify who you are — passwords, sessions, tokens, OAuth, and MFA. Essential knowledge before attacking any auth system.
Beginner·35 min·7 tasks
// By the end of this module
→Describe session-based and token-based authentication flows
→Understand how cookies are set, scoped, and stolen
→Recognise the difference between authentication and authorisation
→Identify common authentication weaknesses at a glance
// Prerequisites