Detection-in-depth is an evolution of the classic cybersecurity principle known as defense-in-depth. Defense-in-depth means that no single security control can fully protect an environment—instead, multiple layered defenses must work together to slow down, detect, and ultimately stop adversaries.

These layers create redundancy, ensuring that if one layer fails, another stands ready to catch the threat. Detection-in-depth applies this same layered philosophy specifically to detection and monitoring. Rather than relying on a single detection point, it ensures that adversary activity can be caught at multiple stages, through multiple methods, and across multiple levels of abstraction. This creates a resilient, overlapping detection strategy that minimizes blind spots and maximizes the chance of identifying attackers anywhere in their kill chain progression. — Read More