We have all been through your pain. How often do we create a password, and then for some unknown reason promptly forget it. Or for those of us who actually write it down, on a scrap of paper or some sticky note, only to lose it in the shuffle of papers on our desk. There are times when a former employee has assigned a password to a document, or someone you cannot reach is away, and you must retrieve the inaccessible file. More often than not, you forgot password to PDF file on your own computer, and just don't know what you did with it. Has this ever happened to you?
PDF files can be created in a couple of ways. If you want the opening of the file to be protected against anyone with the password, or you can encrypt the functionality of the file itself. This will restrict things like printing, copying, saving, or using the graphics in another form or document. There are several free downloadable programs that can be used to break the encrypted code. But remember that these can take quite a while as they use a method of trying every possible combination of letters, numbers and characters. The time consuming process almost makes it easier to recreate the document in the first place.
Some commercial utility programs will remove the problems with a functionality problem. Investment in this type of program may be beneficial if you don't have a lot of time on your hands to try to work around the password problem. Printing can be accomplished by using a screen image-capturing tool to print only the selected area and not the file. But the biggest problem is when the file is protected against opening. These files use the R4 stream cipher encryption method.
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