Well, that's what password protection is for...
I have the username and password is just I cannot click on the box to enter such. That is why I am asking. I can open them on my mac, but not my iPad.
Locked PDF files only require a password, not a username... What kind of protection do these files have, exactly?
Can you share a screenshot of what you're seeing on your desktop computer?
That looks like some form fields, not like the built-in security policy of a PDF file.
It's hard to know how the contents of the file are being hidden. If through a layer then it's possible that showing/hiding it doesn't work on mobile devices.
You need to contact the people who gave you this file and report the problem to them.
[topic moved to Reader/Acrobat DC for Mobile forum]
Is the PDF document "protectedPDF" by Vitrium?
Currently, Adobe Acrobat mobile products (for iOS, Android, Windows Phone) do not support PDF documents with DRM (Digital Rights Management) by third-parties (such as Vitrium).
I am not aware of any other free mobile apps that support "protectedPDF" documents. Would you check with the IT department of your school to see if they can suggest any solutions for mobile devices (e.g. iPad, iPhone, Android tablet/phone, Windows Phone)?
I'd recommend using the desktop version of Adobe Reader on a Windows or Mac computer to view the PDF documents.
Sorry for the inconvenience.