A hash function takes input of any size and produces a fixed-size output in a way that is deterministic, one-way, and highly sensitive to tiny input changes, which makes it fundamentally different from encryption: a hash cannot be reversed back into its original input by design. Password storage exploits this property directly — a system should never store a password itself, only a hash of it, so that even a full database breach does not hand an attacker usable plaintext passwords, provided the hashing was done correctly with salting and a deliberately slow algorithm.
Analogy🏏Cricket
💪 Think of it like fitness: injuries follow a predictable chain — poor warm-up, then form breakdown, then compensation, then the actual tear — and a good physio catalogs where each patient's chain can be interrupted early, rather than only treating the tear afterward. MITRE ATT&CK is the sports-medicine literature of intrusions: a public catalog of every observed breakdown pattern, organized by the stage it serves — how attackers get in, how they escalate, how they extract. Coaches worldwide describe an athlete's risk in that shared vocabulary. This reveals ATT&CK's real value: intrusions become a sequence you can interrupt at stage two, not a disaster you discover at stage five.