Encrypt EACH document!

This app does exactly what I was seeking. It allows users to assign a password to each document, even existing PDFs. All of the other PDF apps that I tested claimed to offer password protection, but it is always to lock the entire app, or folders within the app, not encryption for individual documents. Well worth the in readily low price! Finally!

The real miz luv about PDF Tools - View, Store, Merge, Split & Password Protect PDFs