Quote:
Originally Posted by Shaggy
In essence, you're both right. Amazon aquired the DRM scheme from Mobipocket, but they effectively "rolled their own" by altering it slightly and hosting their own server to handle the kindle DRM. It's not "standard" Mobipocket in the sense that you can't buy Mobipocket DRM content elsewhere and have it work without jumping through some hoops. The PID ranges are different, for one thing.
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The PID is different, yes, but the actual encryption algorithm is identical - that's what I was referring to when I said that it's the same DRM mechanism, and is why, given an encrypted book and an encryption key (the PID), the same code can be used to decrypt a book whether it's been bought from Mobipocket or from Amazon.