[AshamedCaptain]

> that a malicious actor who can access data storage can also necessarily access a silent mechanism to affect the security internals of a given iPhone?

A malicious actor who can access _already encrypted_ data storage where you cannot even associate files with a given account ID _without_ having already put a backdoor in the corresponding code may be able to actually put such backdoor in the software that is distributed to iPhones? Yes, I believe that.