Remote administration of Linux servers overwhelmingly happens over SSH, and how that access is authenticated is one of the highest-leverage security decisions an organization makes, since it is quite literally the front door to every server. Password-based SSH authentication is vulnerable to brute-force and credential-stuffing attacks at internet scale, while key-based authentication relies on asymmetric cryptography where the private key never leaves the user's machine, making remote guessing computationally infeasible rather than merely difficult.
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.