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Old 12-12-2007, 04:04 PM   #1
Alexander Turcic
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Amazon Kindle Hack: Read DRM-protected Mobipocket content

Hasn't it bothered you to be stuck with Amazon when making e-book purchases for your Kindle reader? Well, our famed reverse-engineer friend igorsk wrote his own application ("Mobipocket PID calculator for Amazon Kindle") to generate a valid Mobipocket PID from your Kindle's serial number. You use this PID to make your Mobipocket purchases; afterwards, you use another tiny application ("The Kindleizer") to convert the purchased Mobipocket e-books into a format that the Kindle would accept.

No question, this development will delight all Kindle customers but perhaps provide no small amount of frustration to the good folks over at Amazon.

You can download the tools (written in Python) over here: link removed on Amazon's request
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Old 12-12-2007, 04:14 PM   #2
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Igor does this mean you've abandoned your Sony Reader projects?

And congrats on your Kindle efforts... this is highly appreciated!

Last edited by TadW; 12-12-2007 at 04:59 PM.
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Old 12-12-2007, 04:35 PM   #3
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Is there anything that this guy can't do? Excellent news!!
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Old 12-12-2007, 04:47 PM   #4
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The question is if Amazon will do a Apple and update the kindle with some kind of protection against this?
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Old 12-12-2007, 05:01 PM   #5
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The question is if Amazon will do a Apple and update the kindle with some kind of protection against this?
Shhhh...

Maybe they won't find out.
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Old 12-12-2007, 05:05 PM   #6
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Shhhh...

Maybe they won't find out.
LOL!
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Old 12-12-2007, 05:06 PM   #7
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I don't have a Kindle yet, but I downloaded it anyway, just in case he gets a cease and desist from Amazon.
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Old 12-12-2007, 05:08 PM   #8
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Hmph, if the PID is generated from the serial number, I don't see a way for them to "fix" this, without also breaking access to our "legit" Kindle purchases. It's interesting. I wonder if he can do the reverse, de-Kindle an AZW file I've purchased from Amazon. That would allow me to read all my content on my Gen3!
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Old 12-12-2007, 05:13 PM   #9
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Wouldn't this be an excellent case for "Fair Use"? No DRM is cracked, no protection is broken, no copyrights violated.

A "deKindleizer" would be a great idea! All those cheap Kindle books from Amazon, usable on other readers like the iLiad or the Cybook... *yum*
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Old 12-12-2007, 05:15 PM   #10
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You'd still have to get the PID for those other devices into the files, though, wouldn't you?
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Old 12-12-2007, 05:32 PM   #11
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You'd still have to get the PID for those other devices into the files, though, wouldn't you?
Hadn't considered that. In that case, I guess it's probably not such a good idea. Most mobi sites allow you to have more than one device, but Amazon only allows Kindle content to be read on the Kindle (or multiple Kindles, from what I can discern).
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Old 12-12-2007, 05:36 PM   #12
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Agreed. And this (getting the PID into AZW files) could be considered breaking of the DRM, which is probably really not a good idea.
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Old 12-12-2007, 05:56 PM   #13
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This device should do this out of the box. There is no reason why my books purchased in Amazon's Mobipocket DRM should not work with Amazon's ebook reader.

I'm sick of DRM. I only wish there was an easy way to strip the DRM from these so I can read the stuff I buy on the device I choose. Makes you want to go back to paper books.
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Old 12-12-2007, 05:58 PM   #14
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There is still a chance for this to be broken. Since Amazon owns Mobipocket, if they can identify the PIDs used by Kindles, they could disallow those at the authenticating server; thus no new books could be encrypted with those PIDs.

Just a thought. Make sure you keep backup copies of those Mobipocket books.

*back to reading my iLiad*
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Old 12-12-2007, 06:12 PM   #15
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Thanks to igorsk who released the code we know that a crc32 routine is involved in calculating the PIDs for Kindle devices. Since it's relatively easy to reverse crc32, I assume xianfox is right - Amazon could theoratically determine if the PID is related to a specific Kindle serial.
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