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Recognize classic mistakes without building attack tools.
1. Homegrown Crypto
Why you should not invent ciphers.
15 min
+18 XP
2. ECB and Reused Nonces
Patterns that leak.
3. Trusting Client-Side Only
Secrets in apps/JS.
4. Lab: Mistake Checklist
Write do/don’t list.
25 min
5. Quiz — Crypto Mistakes
Mistake literacy check.
10 min
