I've noted the hacks out there for PS4; most of them involve completely bypassing the PS4's root-level security. Some involve access via USB, others may be remotely installable. For a time, unknown persons had access to my PS4 physically.
I've noticed remote-play like effects and other local problems while playing games that didn't exist before. I'd like to know if there's a way to see if the original firmware and/or certificates, etc, are in place.