I&#x27;m not sure it was over-engineered. Recall when Touch ID was introduced there was huge media backlash: Apple is stealing our fingerprints, how do we know there isn&#x27;t an NSA backdoor to the fingerprint storage, and so on.<p>The Secure Enclave system was set up exactly to counter those concerns.<p>Interestingly, when other phone vendors later implemented fingerprint unlocking there was far less outrage. Even when the fingerprint images themselves were found as unencrypted raster images on device storage.