PDF (Portable Document Format) is the most widely used file format nowadays on the Internet for its wide compatibility (Be able to use in PC, Mac, etc.) and security. Almost all files including textbooks, e-books over the Internet are PDF files. Adobe allows creators to set PDF password to secure their PDF documents. There are two PDF password types: PDF user password and PDF owner password. Here in this article we would like to share some general knowledge of PDF password types for your reference.
PDF Owner Password, also known as PDF Permissions Password, Change Permissions Password, or PDF Master Password, is the password used to set document restrictions in PDF files, including printing, changing the document, document assembly, content copying, page extraction, commenting, filling of form fields, signing, and creation of template pages. If a PDF file is protected with an Owner Password, people can read it, but cannot change it.
User Password is also named as Open Password. It is used to protect PDF files from opening. If a PDF file is protected with a User Password, people need to enter the right password to open it.
Below is the difference between PDF open password and PDF permissions password:
Now, you must have a clear idea about PDF password types. To remove these annoying passwords, go to this article – How to Remove Password Protection from PDF files for help.comments powered by Disqus