Le site pcsx4.com est-il sûr ?

It is very impressive looking scam. Authors of this fraud took a lot of time to look it credible. But you know what? Truth always comes to light. First: I being a computer nerd (don't judge me, please) I found interesting thing, these scammers used open-source 3D graphics engine plug-in OGRE 3D to play PS4 gameplay footage, if I'm not mistaken here is source of this plug-in hosted on GitHub: ***** Second: some person on YouTube managed to bypass surveys to download a fake emulator installer, but unfortunately it does not contain any vital data (I checked it myself), there is also encrypted 7Zip archive contains a fake emulator but it is impossible to decrypt it, 7Zip archives use AES 256-bit encryption keys (unless someone write a program which uses DFA to obtain AES encryption keys). If you want to know more about this well made scam, I recommend to watch this video: https://www.youtube.com/watch?v=k3ocqJ6_Nqw, very detailed video explaining whole scam project. BTW there are few real PS4 emulators, but they are in very early stage of development and they can't emulate major PS4 games yet, they are called Orbital (developed by well-known member of PS3/PS4 hacking scene AlexAltea), Spine (closed-source and Linux exclusive) and GPCS4 (running on Windows and it is able to go ingame in few less demanding games, but in low framerate).

An elaborate and determined scam made to deceive gullible individuals into signing up for a survey supposedly in exchange for a nonexistent emulator. They even went so far as to making a Github repository in a vain effort to cover up their tracks, along with a (likefarmed) Facebook fan page.