Defense in Depth – A Living, Breathing Approach to Security
The pursuit of absolute security is an illusion. In a world where cyber threats constantly evolve and new vulnerabilities emerge, we can never fully eliminate risk. However, this doesn’t mean we’re helpless. The goal shifts from aiming for an impenetrable fortress to building systems that are resilient, and where breaches are difficult, costly, and time-consuming for attackers.
This is where Defense in Depth (DiD) comes into play. It’s a philosophy and a collection of best practices that acknowledge the inevitability of individual security layer failures. DiD creates multiple, overlapping lines of defense throughout a system, making it significantly harder for an attacker to succeed, even if they manage to breach an initial layer. Throughout this chapter, we’ll demonstrate why DiD has become indispensable to any modern security model.
We began by establishing the fundamentals of security...
