Antifragility is a property of a system that does more than survive stress: it improves because of it. Unlike a merely resilient system, which tries to return to its previous state after disruption, an antifragile system uses volatility, shocks, and uncertainty as feedback for adaptation. The term is often applied to organizations, operations, and leadership as well as to technology itself.
In cybersecurity, antifragility matters because attacks, outages, and misconfigurations constantly test people and controls. An antifragile security program learns from incidents by tuning detections, updating playbooks, improving logging, rehearsing escalation, and hardening weak points exposed during real events or tabletop exercises. For defenders, the goal is not to welcome chaos, but to make the organization safer and faster to respond each time it is stressed.