There are several misconceptions in this comment, first and foremost that SHA is encryption, which it is not. It is a hashing algorithm, not unlike MD5, though "stronger".
Secondly, when you have two files that are exactly the same and encrypt both with the same key, method and parameters then both will have the same hash. ( Though I could imagine Apple doing stuff with padding, and other parameters to make this not happen)
Secondly, when you have two files that are exactly the same and encrypt both with the same key, method and parameters then both will have the same hash. ( Though I could imagine Apple doing stuff with padding, and other parameters to make this not happen)