The only thing standing between anyone executing their code on PS4 or Xbox One is a valid signing certificate. If you had it, or if you could trick the system into thinking it doesn't need one, you could just burn your data to a BD disc, or try running it from a USB stick. On the Vita you don't even have an attack vector. It uses propriatery cards for both games and extra storage,with no commercial readers/writers available. I have a Vita Devkit at work and the only way Sony provides for devs to write/read from these cards is through the devkit itself,it has an extra Mini-USB port to connect to PC through special connection. It's super secure from what it looks like.