Vibration is repeated mechanical oscillation in a machine, usually caused by rotating parts, imbalance, misalignment, looseness, or wear. In systems such as turbines, motors, pumps, and fans, vibration is an early warning sign that something is outside normal operating limits.
In cyber security and industrial security, vibration matters because it can reveal both physical faults and tampering. Defenders use vibration sensors to detect abnormal behavior, predict failures, and verify that equipment is running as expected. Attackers may try to hide damage, create unsafe conditions, or exploit unstable machinery, so monitoring vibration helps operators spot problems before they become outages or hazards. In practice, rising vibration often triggers inspection of bearings, shafts, mounts, and control settings, making it a key condition-monitoring signal in critical infrastructure and other rotating systems.