"invalid PID checksum" when using mobidedrm, even though it IS valid.

[pdurrant]

Originally Posted by tt2nn

These is one guy who tell me that he can buy books from amazon with a very low price. Is it possible? How can he strip the drm?

No-one can buy books from Amazon for less than Amazon sell to everyone. Anyone offering you books from Amazon for less than Amazon sell them is scamming you - either you won't get the books, or you'll get unauthorised copies.

If you're going to pirate ebooks, don't give money to scamming scammers.

[Sydney's Mom]

Originally Posted by KevinH

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!

[simwi]

Originally Posted by Sydney's Mom

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

Which plugin?

[wallcraft]

Originally Posted by simwi

Which plugin?

Apprentice Alf's Blog is the best place to start to look for tools_v2.1, and other info about DRM.

[simwi]

Thank you! I found the right plugin, installed it and tried to add the azw file to Calibre from the command line as recommended. This is what I got:

DSN: P2tfPYt9r1rPPP5P7YPASt73P2rM5Y666YnU5751
Device PID: SRUFDDECER
Account Token: 84863d4c666603ad24186abf023bffb4de48d1b4
Pid for Bad Things Happen: 2yrl0ChtBQ
MOBI header version = 6, length = 232
Extra Data Flags = 2
Running file type plugin K4PC, K4Mac, Mobi DeDRM failed with traceback:
Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 176, in _run_filetype_plugins
File "<string>", line 486, in run
Exception: K4MobiDeDRM plugin could not decode the file
Backing up metadata
Notifying calibre of the change

Any suggestions?

[KevinH]

Originally Posted by simwi

Thank you! I found the right plugin, installed it and tried to add the azw file to Calibre from the command line as recommended. This is what I got:

Exception: K4MobiDeDRM plugin could not decode the file
Backing up metadata
Notifying calibre of the change

Any suggestions?

Yes, I suggest you post your error and ask your questions on either the ApprenticeAlf Blog (in the appropriate sub-forum) or on the Dark Reverser's New Blog because in this forum we are really not supposed to help you with DRM removal tools too much.

Just a thought, but it does make sense since that is where you downloaded the tools from.

[simwi]

Will do. And big thanks to everyone in this forum, I usually get an answer to my problems by browsing.