Least privilege could have stopped it. Anomaly detection could have caught it. Together, they turn reactive security into proactive control.
Least privilege is the discipline of giving every user, service, and process the minimal access it needs—nothing more. It shrinks the attack surface and limits damage when something breaks. But least privilege isn’t a one-time setup; permissions drift, and exceptions creep in. Without constant visibility, old access lingers and unused privileges pile up like dry tinder.
Anomaly detection watches for the spark. It finds unusual access patterns before they turn into breaches. That means spotting when a dormant API key wakes up and calls a sensitive endpoint, or when a service account suddenly touches datasets it’s never seen. Done right, anomaly detection doesn’t drown you in alerts. It focuses on meaningful deviations, rooted in the context of least privilege baselines.
When these two practices work together, defense becomes dynamic. Least privilege defines the safe zone. Anomaly detection enforces it in real time. You gain both prevention and detection. The moment permissions cross a line, the system knows and responds.