Some password removal tools, for example a well-known software called “PDF Unlocker”, gets the user to install unnecessary plug-ins and browser toolbars in order to use it. Many password removal tools that are free require the user to download irrelevant software onto their computer. If you are looking at password remover tools for your legitimate use (to unlock PDF files that you have forgotten the password for) then you will need to exercise a great deal of caution with freely available password remover tools. But even here PDF password remover companies provide PDF cracking tools that will remove anything but the strongest of Document Open passwords. an unauthorized user) gets hold of a password-protected PDF, not knowing what the password is. So, protection is only provided if someone (i.e. However, the dilemma is that the people you are sending protected PDF files to need to have the Document Open passwords in order to read them. You therefore must add a Document Open password to the PDF or the permissions password can be easily removed. These make it trivial to remove permissions from a PDF and do what you like with the document. In fact, when it comes to removing PDF permissions, you don’t even need to use a password removal program – there are other, simpler methods – see Removing PDF Restrictions. This is due to inherent weaknesses (or flaws) in the design of the Acrobat Standard Security handler. The permissions password, however, can be broken trivially no matter how strong it is. The stronger the document open password, the longer it will take to crack or remove a password from the PDF with PDF user password remover tools.
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