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Hashing and password storage

Explain why well-built systems store salted, slow hashes of passwords instead of the passwords themselves.

⏱ 20 min❓ 9 questions

What you'll be able to do

  • ✔I can describe the properties of a cryptographic hash function
  • ✔I can explain how salting and slow hashing defeat common attacks
  • ✔I can trace how a login system checks a password without storing it

How this works

  1. 1Read the short explanations first — they teach you what you need before each question.
  2. 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
  3. 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

9 questions and 1 quick teaching card, including:

  • 🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

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Curriculum: AC9TDI10K01, AC9TDI10P11