Skill
Hashing, symmetric vs public key, why you do not invent ciphers.
Curated resources
Scores are LearnPath editorial opinions (clarity, cost, freshness, project density) — not an objective ranking. Every YouTube item is embedded officially after a click-to-load facade.
Cryptopals3h
Legal, well-designed crypto practice. Do not attack real systems.
1h 33mLearnPath pickDavid Bombal1h 33m
A ninety-minute conversation-and-demo on what cryptography actually does — hashing, symmetric and asymmetric encryption, key exchange, where implementations break. Accurate, practical and free of hand-waving.