Learn in the textbookTechnical and Physical Vulnerabilities
DefinitionDestruction (破壊) is damage that breaks equipment, storage media, or data so they can no longer be used, and it can come from an accident or from deliberate human action.
ExplanationIt directly undermines the state of being usable when needed (availability, 可用性). Locks and entry/exit control guard against people damaging equipment, and backups guard against data loss.