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. The Permissions password– required to set, change or remove PDF restrictions.The Document Open password– required to open the PDF file.In the Adobe PDF standard there are two passwords you can apply to encrypt a PDF file:

If you want to share PDF files securely, then using obvious passwords is not going to provide much protection. Typical passwords NOT to use include: 123456, 123456789, password. The process takes maybe a few minutes for thousands of passwords. Dictionary attacks use a massive database of popular and common passwords and try all of them to see if any work.

They use various methods to remove a password from a PDF, such as dictionary attacks. PDF cracking programs are highly effective in decrypting PDF files and many of them are available for free. They encrypt the content of a PDF file and hope that no one figures out how to decrypt it.” One might ask: how did PDF password remover tools become so effective? This article provides a clue – “Adobe’s PDF protection scheme is a classic example of security through obscurity. However, as with all applications, they were quickly misused to help unauthorized users unlock a PDF or remove permissions so that they can copy and share the document. Here, it is important to mention that PDF password protection remover tools were initially invented to be used only under appropriate circumstances – that is, only if the original creator has lost the password or the user has a legal right to view and modify the PDF but does not have it. Numerous tools to remove a password from PDF can be used to gain access to a PDF despite a lost password.

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