

But even then you’re not left without options! Dictionary Attack

If the PDF is protected with a strong 128-bit or 256-bit key, Advanced PDF Password Recovery performs a range of attacks on the PDF file document in order to obtain the original password. The technology is available in the Enterprise edition, and will unlock a protected document in a matter of minutes instead of days. The unique Thunder Tables® technology developed by ElcomSoft uses pre-computed tables to significantly speed up the recovery of 40-bit keys.
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While the Professional edition takes up to several days to recover a PDF document protected with a 40-bit key, the Enterprise edition can unlock an encrypted PDF in a matter of minutes! Thunder Tables® Technology (Patented) Advanced PDF Password Recovery guarantees the recovery of 40-bit keys by attacking the encryption key instead of attempting to guess the password. The PDF format specifies two types of protection: the weak 40-bit and the strong 128-bit encryption.

What if you can’t open a PDF document at all without knowing the correct password? In that case, you’ll need the password recovery feature found in the Professional and Enterprise editions of Advanced PDF Password Recovery. If you can open a document without a password, but cannot print it at all or are restricted to low-quality output, or if you cannot copy data to clipboard or cannot edit the document, read no further and get Advanced PDF Password Recovery Standard edition! Passwords to Open This is by far the most common protection found in PDF files. Remove annoying restrictions from PDF files! Advanced PDF Password Recovery instantly unlocks PDF documents that restrict you of printing, editing or copying of data to clipboard. Instant Access to Restricted PDF Documents
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