Risk reduction is the set of measures used to lower the chance that a harmful event will happen, or to reduce the damage if it does. In cyber security, that can mean hardening systems, limiting access, segmenting networks, patching vulnerable software, improving monitoring, and preparing backups and recovery plans. The goal is not to remove every risk, but to make attacks harder to execute and less costly if they succeed.
In real attacks, risk reduction appears in defense programs that target the most likely paths of abuse, such as phishing-resistant authentication, safer admin workflows, and tighter control of sensitive data. In critical infrastructure, it also includes assessments and consultations that help operators spot weak points before an incident. A voluntary support program like ChemLock uses risk reduction to guide practical improvements at chemical facilities, where the impact of a breach, sabotage event, or unsafe disclosure could be severe.