Your Face Unlocks Nothing: The 3 Hidden Layers Deciding Who Gets Through That Door

The evolution of biometric decision stacks represents a significant shift in how we architect computer vision systems. For developers building facial comparison or access control tools, the news is clear: a simple 1:1 match is no longer a sufficient unit of verification. The industry is moving toward a "decision stack" where the comparison algorithm is just the foundation, layered beneath liveness detection and policy engines.