Thread: Amazon and DRM changes
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Old 06-21-2023, 10:14 PM   #2136
jhowell
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Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by Sats View Post
I have no idea what is in Kindle firmware, since I don't have one. I only modified tools to work with Kindle for PC/Mac. From what I can tell, they did not add any new "versions" that were not in the tools already (~13 "keys" and 3 scramble algos that they can combine at will). But I cannot be sure. And I am not sure I got the third scramble correctly implemented, since I could not test it. We'll see, I guess. (3rd scramble is only in a fork)
As far as I can tell Kindle e-readers and apps all have the same DRM. I believe that your third scramble is correct and should handle KFX DRM up to V28 with some exceptions due to incorrect keys in the key table. But there are ten more DRM schemes implemented with far more complicated algorithms and those are going to be much harder to defeat.
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