Ever since Apple's iPhone X was released, the Face ID feature has created ambiguity over issues like privacy and data security. However, Apple has made it clear that it does not gather any customer data. It remains on the user’s device and is never sent to the cloud for training data. Speaking to TechCrunch, Apple’s SVP of Software Engineering, Craig Federighi said, “We do not gather customer data when you enroll in Face ID, it stays on your device, we do not send it to the cloud for training data.”
Adding to clear the ambiguity over Face ID security, he spoke about how facial structure can be changed through plastic surgery and the difference hair colour can make. Federghi said that Face ID has an adaptive feature. Basically the re-training process take place in the Secure Enclave. This re-training does not happen in Apple’s cloud.
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