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Old 11-16-2009, 04:50 PM   #220
pdurrant
The Grand Mouse 高貴的老鼠
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Posts: 74,206
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Join Date: Jul 2007
Location: Norfolk, England
Device: Kindle Oasis
Quote:
Originally Posted by slayda View Post
Actually you don't have to DL to the Kindle, you just have to DL the varient that was made for the Kindle. If you own a Kindle you can DL to your computer and transfer to your Kindle. This is different from DLing to your Kindle4PC which has it's own unique name.



Based on a single AZW book DLed to two different Kindle4PCs and run through a compare (by byte) there were 177 bytes that were different. I assume that the Kindle4PC's PID is embedded in there somewhere but I doubt that it is not encrypted in some manner.
The PID is in the book, but encoded with the PID itself, if I'm reading the MobiDeDRM code right. You can take the PID, and check that a book is encoded using that PID, but you can't get the PID back from the book.

What you need to do is find where Kindle4PC is storing the PID it uses. I suppose it must send this PID back to Amazon at some point, so perhaps a packet sniffer could spot this. I'd be surprised if they weren't encoding it though.

Kindle4PC must store the PID it's using somewhere on the PC's hard disk. But finding it and decoding it is more than I can manage.
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