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Originally Posted by DNSB
You might also want to use NoDRM's fork of the DeDRM code since that is supported. Apprentices Alf and Harper have passed the torch. Check NoDRM/DeDRM Tools.
If you downloaded an ePub textbook, it likely has Adobe's hardened DRM. See the attached matrix image. |
But I believe DeDRM 10.0.3 breaks the hardened DRM.
From the changelog for 10.0.3.
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Add support for books with the new ADE3.0+ DRM by merging #48 by a980e066a01. Thanks a lot! (Also fixes #96 on MacOS)
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and in #48...
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The second commits adds support for ""hardened"" Adobe DRM and updates the documentation accordingly. In a nutshell, this so-called "hardened DRM" is just another layer of encryption on the encrypted key, using info that's fully available in rights.xml
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So there's no need to worry if you get the new DRM or not.