Originally Posted by bigbird1985
But I still wait that someone can find a downgrade way...
It's looking less and less likely that this breed of bootloader will ever be revocable in any practical fashion due to the nature of eFuse tech. Basically, as I understand it, when the bootloader detects whatever it deems to be an unauthorized modification it trips the eFuse... Which physically burns a pathway into the microchip. Originally intended to be used as a way to adapt a chip's functions in real-time; when used in the way KNOX is designed, eFuses become incredibly sinister by essentially etching corrupted pathways into the chip. The only possible fix would be to bypass the affected areas of the chip, but once it's done that's it. You cannot unwrite the physical damage done to the chip.
Personally, I think Samsung ought to be sued for not providing an explicit notice on the impact of the KNOX bootloader they snuck into the official OTA update since they have essentially caused physical damage to another party's personal and/or intellectual property. Unfortunately, I doubt such a lawsuit would stand much of a chance for success.