Apple quietly adjusted the security of its chips for new products last fall.
New products from Apple that contain chips A12, A13, S4 or S5 are more secure than older products with the same chips. An Apple Support page reveals that the company quietly tweaked components last fall.
Specifically, it concerns the Secure Enclave of these chips. This part is responsible, among other things, for authentication via Face ID and Touch ID and the protection of your data. The adjustment concerns the Secure Storage Component, where data is stored and is now slightly more secure.
Apple is not clear about which products have improved chips. In any case, it seems to be the HomePod mini, Apple Watch SE and eighth-generation iPad.