Quote:
Originally Posted by pdurrant
Did you enter the password into calibre? If so, how? If not, how do you think the password protection was defeated? If you tried to open the original PDF in some other PDF viewer, did you get a warning that the file was password protected and couldn't be viewed?
When I try to do that, I get a big
"Cannot convert password.
This book is locked by DRM. To learn more about DRM and why you cannot read or convert this book in calibre, click here.
A large number of recent, DRM free releases are available at Open Books."
dialog.
I suspect that you did not correctly apply a password that encrypted the contents of the PDF, or you accidentally imported the non-drm version, or you have previously imported the non-drm version, and then imported the drm version, thinking it would replace the earlier copy (it doesn't).
Calibre does not contain any DRM removal code, nor can it view or convert password protected PDFs.
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Perhaps we're talking at cross purposes again. The only reason I have secured PDF's in the past is to make it harder for people to make changes to the document and then re sell it. So it prohibits copying and pasting and altering the document. It doesn't stop people from opening the document and reading it. I don't see any sense in having that kind of prohibition, because you really want them to be able to read it without hindrance.
When I converted it in Calibre, I didn't get any dialogue box asking me for a password or telling me that I couldn't convert. It just went through the process and converted it to mobi.
I don't know what level of security you are putting on your PDF's and I equally don't know how Calibre converted this one. But if you follow the steps that I did, instead of calling me a liar out of hand, you might find that it works for you too.