PS4 Act.dat and RIF File Research alongside the PS4 Entrypoint 4.05 fork and recent PS4 4.05 Playground Port, today PlayStation 4 developer IDC updated his Github with some PS4 Experiments for 4.05 Firmware users to test out at their own risk he states.
Download: ps4-experiments-405-master.zip / GIT
According to @DarkElementPL, while there is some interesting code included to activate RIF keys it's commented out possibly for later use as you currently can't build... yet.
To quote from the README.md: PS4 Experiments 405
Code for random experiments. May or may not work. Run at your own risk.
In other PlayStation hacking news today, @Mistawes shared on Twitter some pictures of successfully dumping the PS4 kernel using a hardware modification following Fail0verflow's Documentation and the recent PS4 4.05 Kernel Dumper fix updates.
Thanks to @prreis for the news tip in the PSXHAX Shoutbox this afternoon!