A 95% Facial Match Falls Apart If the Face Itself Is Fake

How deepfakes are changing the landscape of biometric verification For developers building computer vision (CV) and biometric pipelines, we’ve spent the last decade chasing the "perfect" F1 score. We’ve tuned our thresholds and optimized our Euclidean distance calculations to ensure that when a system says two faces match, they actually match. But as synthetic media reaches parity with reality, we are hitting the "Accuracy Paradox": a 99% accurate facial comparison algorithm produces a 100% false result if the input data is a deepfake.