Average power is the amount of energy a system delivers over time, usually expressed as watts. It smooths out fast changes and tells you the long-term output, not the brief spikes. In a pulsed device, average power can look modest even when each pulse is extremely intense, because the energy is concentrated into very short bursts.
In cyber security, this distinction matters in hardware attacks and defenses. Power-analysis attackers study how a device’s power draw changes during encryption or other processing steps, often using average traces to compare repeated activity. Defenders also monitor average power consumption to spot abnormal behavior, faulty components, or hidden implants. But average power alone can be misleading: a low average may still hide high peak output, so engineers must look at both the long-term profile and the instantaneous peaks when assessing risk.