This has been answered in another thread. Here's the link:
https://www.mobileread.com/forums/sho...821#post639821
Jim Lester is Senior Programmer - Digital Publishing at Adobe Systems
Quote:
Originally Posted by ps56k
I've just recently started reading various threads over on the B&N Nook forum, along with participating in our local branch library usage of the Overdrive system and ebooks. I have several confusing Q&A's about DRM....
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...
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.
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" ?
I specifically went to my virtual library and checked out and downloaded an epub format & a pdf format - just to have and comapre/test.
Both open within Adobe Digital Editions, but I don't have any Reader device to copy them over just to see how they work/fail.
Trying to open the PDF/DRM with normal Adobe Reader results in an error message indicated DRM is active and to open with ADE...
In my mind, this is how things would work on any device without explicit DRM support via a PID and local software to encrypt the ebook with that device's PID.... which brings me back to the Nook - and trying to interpret what they will support from the external world (not purchased via B&N) and why the Overdrive library books may, or may not, have a "different" DRM ?
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