noDRM
commented
2 years ago Looks interesting, but probably pretty difficult to add, especially if I don't have access to such a file (and the necessary keys). The PDF format is very very complex, especially when you need to write the whole parser and can't easily use existing modules.
- Do you happen to know if there's any existing other tool that can remove that DRM? I didn't find any with a short Google search, but you never know ...
- On that web page I read that you need to enter your Torossa credentials to open such a PDF in Acrobat. Does that work as well with a new PDF (never opened before) or do you need an internet connection the first time / or every time you open the book?
- Do you know if there happens to be any free or very cheap book in that bookstore that I could buy / download to experiment with? If opening the file requires an internet connection then there's probably a fair chance of getting the account banned at least while trying to develop a DeDRM solution so there'd probably be a need to buy multiple books on different accounts for that.
DarthSaddest
Torossa - an online book store, which is increasingly subscribed to by universities - is using Adobe EMDS. The (DRM-ed) pdf files cannot be opened except via Adobe Acrobat and publishers might or might not allow you to print pages or copy text.