Yes so they cant interfere with how it protects them, as another commenter noted.
That parts of a system must be prevented from knowing/interfering with the inner workings of each other to protect the integrity of the whole is a general pronciple in many things Itl think.
That parts of a system must be prevented from knowing/interfering with the inner workings of each other to protect the integrity of the whole is a general pronciple in many things Itl think.