Minimalism is a design approach that removes anything not considered essential. In cyber security, it means building systems with fewer services, fewer dependencies, and a smaller attack surface. The goal is not to make a system bare; it is to keep only the parts needed to do the job well.
This matters because every extra component can add risk: more software to patch, more settings to misconfigure, and more paths for attackers to abuse. Defenders use minimalism in hardening, least privilege, and compact system images. Attackers may also use minimalist malware or tooling to stay small, load quickly, and avoid detection. The key tradeoff is that removing too much can also weaken logging, redundancy, or recovery. Good security minimalism is deliberate: essential controls stay, unnecessary complexity goes away.