Energy intensity is the amount of energy required to produce one unit of output. In industrial settings, that might mean kilowatt-hours per ton of product or per dollar of revenue. In cyber security, the same idea helps measure how efficiently computing systems turn power into useful work, such as transactions, analytics, or packet processing.
Why it matters: higher energy intensity often means higher operating cost, more heat, and a larger attack surface for availability problems. Defenders watch for unusual spikes in power draw because malware such as cryptominers can increase energy intensity without delivering business value. Attackers may also exploit inefficient workloads, forcing systems to do excessive computation in denial-of-service or resource-exhaustion attacks. On the defense side, monitoring energy use alongside CPU, memory, and network metrics can reveal compromised hosts, inefficient virtual machines, or infrastructure that needs tuning. Lower energy intensity usually means better resilience, lower cost, and easier anomaly detection.