Since PDF was create in 1993 by Adobe System, it becomes more and more popular and finally used as an oepn standard for document exchange and long-term archive. What makes PDF so wonderful that it becomes one of the most important and popular file format in a lot of work industries. Among the most amazing PDF features, I think PDF's high security is the main reason why people prefer PDF. Users can set PDF password to protect their PDF files from copying, printing or editing. But there are two PDF password types - owner password and user password, so, we must spend some time to know these two PDF password types before we can make best of it.
Owner Password
The PDF creators allow users to set owner password to protect their PDF files from printing out, copying text and graphics out of the document, editing the PDF files, or adding or modifying text notes.
Sometimes, people may want to remove owner password from PDF to make the PDF files printable and replicable; it's known that PDF can't be edited without a professional PDF editor like Adobe Acrobat X Pro and normal PDF Password remover only can remove PDF restrictions of copying and printing, you can't make a PDF editable with it.
User Password
Or called open password. You can't open a PDF file without correct password if it was restricted with user password.
In order to use the PDF files efficiently, you'd better remember all the open passwords for each PDF file, you can make an Excel list to write down for record.
If you want to set PDF password to your PDF file, you can go to this article - how to set PDF password.
