Thread: "invalid PID checksum" when using mobidedrm, even though it IS valid.
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Old 10-01-2010, 03:36 PM   #137
Sydney's Mom
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Join Date: Dec 2008
Location: Idaho, on the side of a mountain
Device: Kindle Oasis, Fire 3d Gen and 5th Gen and Samsung Tab S
Quote:
Originally Posted by KevinH View Post
Hi,

Yes, I think the Kindle 3 comes with firmware >= 2.5 automatically.
If so you can no longer copy books from your Kindle 3 and use the MobiDeDRM.py script since there is no way with that device to determine the book specific PID. Amazon has improved the security via that firmware update and all newer models have that.

A solution is to get "Kindle For PC", register it, download all of the books you have already purchased for your Kindle 3 onto it (via the "Archive") and run K4PCDeDRM.pyw on them.
Google "Apprentice Alf's Blog" for more info, links to tools_v1.9, etc since none of that can be linked to from here.

KevinH
Now you can just copy them onto your desktop (from Kindle for PC) and import them into Calibre. The plug in works great!
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