Thread: "invalid PID checksum" when using mobidedrm, even though it IS valid.
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Old 10-01-2010, 11:47 AM   #133
KevinH
Sigil Developer
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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
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