In today s landscape, cloud-native architectures, distributed systems, APIs everywhere, security is no longer a layer you add later.
It is a foundational architectural decision.
If security is not defined at the architecture stage, you end up with:
Fragmented access control models
Inconsistent data protection mechanisms
Reactive incident handling instead of proactive defense
Expensive rework and technical debt
Increased risk of breaches, compliance failures, and reputational damage
Modern systems demand security by design, not security by patching.