Like most PDF tools, it also provides some attacks including brute force, and dictionary modes of attack. This PDF unlocker is actually an open source (GPL) utility which can be run on Windows, Linux and Mac platform, and comes free of cost. It is a very reliable and easy to use PDF unlocker tool. PDFCrack is practically a command line driven utility meant to open a password restricted PDF file. Open Password: Also known as User password, does not even allow reading the PDF file. With this password restriction, you can read the PDF contents, but are not allowed to edit, print or modify any of it. Owner Password: It is also known as Permission/ Change Permission/ PDF Master password.
But before you begin exploring the article you should know that PDF passwords are of two types - Open Password and Owner Password.What is the Difference between Owner Password and Open Password?
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