You can try Page Plus 9.0 on a 60-day money back guarantee. It produces high quality PDF files and one can add security passwords. click here It is also a highly capable DTP program that can produced decent websites.
However, if you need to make PDF files from Word Documents or Excel spreadsheets you will need a different program. PDF Factory is available as shareware. click here. The Pro version has docment security features. It works like a printer driver so can be used to make PDF files from any Windows program.
For the best quality PDF files, I would choose the first option, but it may mean some work cutting and pasting documents into Page Plus.