In related news, graf_chokolo has now detailed how to decrypt PS3 PKGs as noted HERE.
To quote: Today he's shared his work with the public, however, it still requires some work, before it is fully functional. Right now, his code still requires the dongle master key, one that is buried within the PS3 console. The good news, is zAxis feels this key can be retrieved via a 3.15 fw console.
He is asking the community, anyone with a 3.15 console, to help retrieve this key. Once retrieved, PSGrade should become fully functional. Below, is his request to the public.
160w ago - A few days back we reported on the PS JailBreak Downgrade file leak, and today Hansi of PSXCare.com (linked above) has followed up on some previous work and shared a video of a PS3 downgrading with PS Downgrade and a Beagle 480 USB protocol analyzer.
Additionally, a video showing a 3.50 to 3.41 PlayStation 3 downgrade in what is being called the world's first PS3 downgrader (excluding Infectus, of course) is available courtesy of Disjod below stating that the software which appears to utilize the PS3 Factory/Service Mode requires an original PS JailBreak mod-chip.
To quote: "PS Downgrade is not a new chip, but it is the much anticipated software update to the original PSJailbreak...