Invented by Adobe, Portable Document Format (PDF) is the published specification used by standards bodies around the world for more secure, reliable electronic document distribution and exchange. Adobe PDF has been adopted by enterprises, educators, and governments around the world to streamline document exchange, increase productivity, and reduce reliance on paper. It is the standard format for the electronic submission of drug approvals to the U.S. Food and Drug Administration (FDA) and for electronic case filings in U.S. federal courts. We often download PDF files from the website or get them from our friends. Sometimes, when we open the PDF files, a forms of password input appear on the screen but we do not know about it at all. Or we set the password ourselves for safe but we forget it. Unfortunately, if a user password is unknown, there is no easy way to recover the password to a PDF document. How should we do? I introduce you a tool which can decrypt edit protected PDF files easily and quickly. That is Advanced PDF Password Recovery which is designed by Elcomsoft. Did you hear about it? It provides great help to me and I expect that it will help you when you have the same trouble as me.

Advanced PDF Password Recovery is a tool to decrypt protected Adobe Acrobat PDF files, which have Owner password set which can prevent the file from being edited, printed etc. This program (Advanced PDF Password Recovery, or APDFPR) is intended to decrypt password-protected and restricted Adobe Acrobat PDF files, which have "user" password set (required to open/view the file), and/or "owner" password (when the file is only protected from editing, printing etc), i.e. remove the protection and/or break the PDF password. Restricted files are being unprotected instantly, while decryption of files with "open" password may be time-consuming. It both the owner and master password are set, we will need at least one of them for the decryption to work. The decrypted file can be opened in any PDF viewer without any restrictions. Three versions (editions) are available: Standard, Professional and Enterprise.

Unfortunately, APDFPR do NOT work on Mac computers with Virtual PC; unfortunately, it seems to be a problem of Virtual PC itself. Also, PDF files protected with any 3rd party security plug-ins such as FileOpen (FOPN_fLock) are not supported.

Additional features include batch processing, Explorer right-click integration and additional conversion of Kinko`s Document Format (KDF) to PDF format. The program is simple to use, just select the PDF file and the rest is done automatically, you will be prompted to specify a new file name for the decrypted file. This product may cause our anti-virus software to show an alert!

Advanced PDF Password Recovery 4.11 is a Password Recovery product from elcomsoft.com, get 5 Stars SoftSea Rating, Advanced PDF Password Recovery is a software to decrypt protected Adobe Acrobat PDF files, which have Owner password set which can prevent the file from being edited, printed etc. It both the owner and master password are set, you will need at least one of them for the decryption to work. The decrypted file can be opened in any PDF viewer without any restrictions. Additional features include batch processing, Explorer right-click integration and additional conversion of Kinko`s Document Format (KDF) to PDF format. The software is simple to use, just select the PDF file and the rest is done automatically, you will be prompted to specify a new file name for the decrypted file.
Get access to password-protected PDF files quickly and efficiently! Instantly unlock restricted PDF documents by removing printing, editing and copying restrictions! Advanced PDF Password Recovery recovers or instantly removes passwords protecting or locking PDF documents created with all versions of Adobe Acrobat or any other PDF application.
Advanced PDF Password Recovery Features and Benefits:
Supports all versions of Adobe Acrobat
Supports all third-party products producing PDF files
Instantly unlocks PDF documents with printing, copying and editing restrictions
Removes owner and user passwords
Recovers passwords to open
Supports 40-bit and 128-bit RC4 encryption as well as AES encryption
Patent-pending Thunder Tables? technology recovers 40-bit passwords in a matter of minutes
Dictionary and brute-force attacks with user-defined masks and advanced templates
Three editions to satisfy the most demanding and savvy customers
Optionally removes JScript code, form fields and digital signatures
Batch mode allows automatic processing of multiple files
Highly optimized low-level code optimized for modern multi-core CPUs
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. This is by far the most common protection found in PDF files. 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!
The PDF format specifies two types of protection: the weak 40-bit and the powerful 128-bit encryption. Advanced PDF Password Recovery guarantees the recovery of 40-bit keys by attacking the encryption key instead of attempting to guess the password. 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 (Patent Pending)
The unique Thunder Tables technology developed by ElcomSoft uses pre-computed tables to significantly speed up the recovery of 40-bit keys. The technology is available in the Enterprise edition, and will unlock a protected document in a matter of minutes instead of days.
Strong Password Recovery
If the PDF is protected with a powerful 128-bit key, Advanced PDF Password Recovery performs a range of attacks on the PDF file document in order to obtain the original password. But even then you re not left without options!
Dictionary Attack
Most passwords used by living beings are based on a word or phrase. Performing a dictionary attack by attempting different combinations of cases and variations of words and characters before reverting to a comprehensive brute-force attack allows for considerate time savings shall the attack succeed.
Brute Force Attack
If the password does not fall into any dictionary, Advanced PDF Password Recovery attempts all possible combinations of passwords by performing the brute force attack. The highly optimized low-level code provides the best-in-class performance for the brute-force password recovery. Multi-threaded optimization ensures optimum performance on the modern multi-core CPUs.
Additional Notes
Mac Computers and Virtual PC: Advanced PDF Password Recovery does not run on Virtual PC and a Mac as a host computer.
DRM and Third-Party Security Plug-ins: Advanced PDF Password Recovery does not support PDF files protected using Digital Rights Management (DRM) technology or any third-party party security plug-ins such as FileOpen (FOPN_fLock).
Advanced PDF Password Recovery Features:
Supports Adobe Acrobat from 3.x to 8.x
Supports 40-bit RC4 encryption
Supports 128-bit RC4 encryption
Supports AES encryption
Remove restictions from protected PDF files
Decrypt PDF files if 'open' password is known
Brute-force attack on 'open' password
Dictionary attack on 'open' password
Guaranteed recovery for 40-bit encryption (takes several days)
Removing digital signatures
Removing JScript code
Removing form fields
Guaranteed recovery for 40-bit encryption using Thunder tables? (takes several minutes)
One year of free upgrades and technical support The license of this antivirus & security software is Free Trial Software, the price is $49.00, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of Advanced PDF Password Recovery, you can buy this antivirus & security software.