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Web Security / Thinking like a defender

Lesson 3 of 27

Authentication vs authorisation

Authentication checks who you are (login). Authorisation checks what you're allowed to do. Many breaches happen when a site checks the first but forgets the second.

Key points

  • AuthN: who are you?
  • AuthZ: are you allowed?
  • Check both on every request
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Quiz · +10 XP

Checking whether a logged-in user may delete a post is:

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