From http://www.neogaf.com/forum/showpost.php?p=24788717&postcount=96 http://www.neogaf.com/forum/showpost.php?p=24788717&post... - It's the USB Jig Master Key

From http://www.neogaf.com/forum/showpost.php?p=24788717&postcount=96 http://www.neogaf.com/forum/showpost.php?p=24788717&post... - It's the USB Jig Master Key - It allows any currently available PS3 to be put into service mode. - It allows users of 3.50 or below to downgrade. - It doesn't allow 3.55 users to downgrade (currently, though they can still access service mode). This isn't the PS3 master key just as no one knows the PSP master key This will enable any user of firmware 3.5 or lower on the current hardware to run backup games that don't require a firmware of greater than 3.5, pretty much the same story as PSP modding.