In cloud-native architectures, the traditional network-based security perimeter no longer holds. Network isolation and instance hardening alone are no longer sufficient. For most systems, the application layer (Layer 7) is now the primary attack surface. Customer-facing applications and backend APIs are routinely targeted by automated scanners, injection attacks, and Layer 7 traffic patterns designed to blend in with legitimate user behavior.

For architects and tech leaders, application security is often seen as a trade-off between rigorous protection and system performance. In a cloud-native world, however, well-designed security can improve availability and resilience without reducing performance.

By Bhaveer