I have an encrypted PDF file that I can use on any PC by plugging in a username and password. Every time I open the file in Adobe Reader it asks for credentials, it connects to a server, checks those credentials and opens the 600 page PDf file for viewing.
It alows me to print it to a paper printer, but not to a PDf distiller. I would like to convert this file to a regular PDF and rmeove the limitations. (FYI, I have purchased PDF textbook and I'm not breaking any law by accessing the content. The encryption / authentication system however doesn't work on all devices. This encrypted PDF shows up as 600 blank pages on my iPad and my Android phone).
How can I decrypt / convert the file? I am working on a Windows 7 workstation