via
http://wololo.net/2012/07/19/release...-1-01-by-skfu/

SKFU updated his tool PS Vita pkg extractor to version 1.01. He did this release mostly because all previous mirrors had disappeared since the megaupload takedown, but there is no “juicy” new feature.



PS Vita pkg extractor extracts PS Vita .pkg files. It also has some code to decrypt them, but that feature only worked for very early packages, when the encryption key was the same as that of the PSP.

Changelog
•Updated crypto lib
•Content type check added
•Extended menu

http://limelinx.com/1kdb