Last week, PS Vita hacker motoharu released psvpfstools, a set of tools that lets you decrypt anything that’s PFS encrypted on the PS Vita.
decrypting the PFS Layer is already something that can be achieved via Vitashell on a hacked PS Vita. However, Psvpfstools runs the entire decryption task on a PC, without requiring a PS Vita. Motoharu states this can also be used to decrypt 3.61 Vita games and DLC, and it should theoretically work for higher firmware games as well.
Being able to decrypt games (among other things you might want to decrypt from the PS Vita) is useful for things such as mods or fan translations. Although most people were probably content with the possibility to do this directly on the PS Vita, being able to do it on a PC could help speed up the process. It also demonstrates that the whole decryption process has been figured out by the hacker.
Motoharu credits the following people for the release of psvpfstools:
Proxima. For initial docs on DMAC5, providing F00D service and help with crypto theory.
St4rk, weaknespase and everyone involved in PkgDecrypt. For zRIF string decode/inflate code.