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Originally Posted by ps56k
My impression of DRM, from friends with Kindle and reading various forums, is that each device, or desktop software like Adobe Digital Editions, has an electronic serial number or Physical ID (PID) that is used to encrypt or restrict the ebook to be downloaded. Therefore, that ebook will only open and work with that specific software desktop or specific reader device...
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Well, Adobe DRM is a bit more flexible. Each user is assigned a key and that key is locked to a device "serial number" (this what happens during activation). All the books that are downloaded by that user are locked to the user's key (so locking to a device is indirect). This way books can be copied between computers/devices without need for reencoding. Also, books can be backed up and restored.
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On the Nook forum, it was mentioned that the Nook supports epub & pdf. But my question was does it support epub & pdf that are DRM'd - the answer was yes... BUT they also said that the Nook does not support library ebooks from Overdrive.
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Can you provide a pointer? Library books are slightly more complex than purchased books in terms of DRM (mostly because they are returnable), but all devices that support Adobe DRM should be able to support libabry books as well.
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This is my point of confusion....
What is the difference in what they are supporting ?
Are there different types of DRM, with Adobe DRM vs "something else" ?
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Nook is going to suppot a different flavor of Adobe DRM where books are locked to a password (which for BN is a credit card number - just like it works for eReader). This way there are no technological restrictions on the number of the devices where you can read it. But this also means that Nook books will not initially be readable on older devices that support just the existing Adobe DRM flavor. (Adobe will make this new DRM flavor available to all device manufacturers shortly - but it will take time to propagate). On the other hand, books that are locked using the existing Adobe DRM flavor will work on Nook as is.