Split PDF
Break one PDF into several.
Password protect adds a password a PDF will not open without, or removes one that is already there. It uses real AES-256 encryption, the same strength a bank statement PDF is protected with, not a weaker cipher chosen because it needed no extra library.
PDF.
No. A password strong enough to be worth adding is also strong enough that nothing, including EYU SUITS, can guess it back. Keep it somewhere safe.
No -- this sets the password needed to open the file at all. Restricting printing or copying for someone who already has the password is a different, finer-grained kind of protection this tool does not set.
Break one PDF into several.
Render every page as a picture.
Save the pictures inside a PDF, PowerPoint, Word or Excel file.
Give a pile of files one consistent naming scheme.