Quote:
Originally Posted by theducks
I just ran your  DRM finder
It found 2 entries.
1 I knew about 
The other: Adobe- EPUB Best Practices 
Note: this one opens just fine in Calibre Viewer with no other outside help.
As A test, I tried the Known positive, Calibre Viewer pops the 'has DRM' message. |
Ahh, another cryptic from theducks
So if I try to interpret here - it found two results, one was correct and did have DRM that you cannot open in Calibre, but the other Calibre will open, right?
As I said in my post, my check currently only looks for the presence of the encryption.xml file. What it doesn't do (which the Calibre viewer does) is a bunch of other things of looking in the opf file for some encryption key and for files that are encrypted. I confess to not understanding what the Calibre code is doing which it appears your particular file is tailor made for - is it possible to have an encrypted file that is readable by anyone?
Any chance you could PM me a link to the file? I don't have a book that fits in this category to understand what that file is? Perhaps Kovid may explain the situation...