Guaranteed PDF Decrypter

PDF password removal utility
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New 2.3 version with Acrobat 8 and Core 2 Duo support. Mac version is here! 50% discount on any version
 

Version for PDF Permission password removal

Version for PDF Open password removal

User's opinions

  
 

Guaranteed PDF Decrypter purpose
The primary goal of GuaPDF is to
  • remove restrictions on any PDF document (you should have the right to do it, for example, if you forgot the password). Any Acrobat version up to 8 is supported, even with 128-bit AES or RC4 encryption. PDF permission password removal is an instant process. Decrypted file can be opened in any PDF viewer without any restrictions so you may edit/copy/print it.

GuaPDF can be also used for
  • remove the PDF open password. Decryption of the file with password for opening is guaranteed for PDF files with 40-bit key only (Acrobat 3, 4 compatible encryption). This process takes several days on one home computer.
Only standard PDF security is supported, neither third-party plug-ins nor e-books.

This is GUI utility for Win32 and command-line utility for Linux, Solaris/SunOS, Mac OS.

PDF security overview
The standard security of PDF documents can have two different of passwords: a Document Open password and a Permissions password. When a Document Open password (also known as a user password) is set, anyone who tries to open the PDF must type in the password. When a Permissions password (also known as a master password) is set, recipients don't need a password to open the document, but they must type the Permissions password to set or change the restricted features. If the PDF is secured with both types of passwords, it can be opened with either password, but only the Permissions password allows the user to change the restricted features.

Used crypto algorithms were being improved with PDF developing - up to PDF version 1.4 only 40-bit keys have been used, then the 128-bit ones came, and starting from version 1.6, AES encryption is being added.
However, PDF security system is implemented so that a file with restrictions may be decrypted instantly, irrespective of the password length, even for 128-bit keys. A document with password for opening, using 40-bit key, can be decrypted on a modern computer within several days by using guaranteed decryption. To open a document with 128-bit key, only brute force can be used.

Features

GuaPDF is the unique software with full support of Acrobat 7, 8 files (including compressed files and AES encryption).

Advantages of GuaPDF are:
  • Guarantee of decryption
  • Newest PDF 1.7 (Acrobat 8.x) files support, including AES encryption, compressed files and unencrypted metadata
  • Very high speed (optimized for Pentium II/III, Pentium 4, Core 2 and AMD architecture)
  • Confidentiality (you crack your secret files, not someone from cracking service)
  • Versions for single processor, dual/dual-core processor and network version to use power of distributed clients
  • Portability (DOS, Windows, Linux, Solaris, NEWMac OS versions are available)
  • Running in GUI and keeps running in batch mode (as command-line utility)
  
 
 

GuaPDF versions and price
The best way to choose version you need is to run DEMO.

There are some GuaPDF versions:
  • DEMO (freeware) version. It demonstrates processing of both security methods but has some limitations and can correctly decrypt only small files. It also doesn't contain distributed computing mechanism.
  • RESTRICTIONS REMOVER. This version can only unset operation restrictions (i.e. remove owner password) and can not decrypt password-protected files. (€/$25)
  • 2,5-CLIENTS. These versions process both security methods (i.e. open and permissions passwords), have supports for multiple processors/cores and for distributed clients which number are limited. (from €/$39)

All these version are licensed for non-commercial purposes only. If you wish to use GuaPDF to make any profit you should use
  • UNLIMITED, most powerful version. It does everything, has no limitations. (€/$150)

 
Version Restrictions (or permission password) removal,
Acrobat 3.x-8.x up to 128 bit key		 Key searching Decryption using found key (user password removal) Distributed mechanism

 License Average time to decrypt (on Core 2 Duo E6300) Price
 RC4 encryption (40 and 128 bit key)  AES encryption (128 bit key) Acrobat 3.x, 4.x, 40-bit key
 
Demo YES (only small files) YES (only small files) YES YES (only small files) NO (single computer) Freely distributable 1 week FREE
Restrictions remover Instantly Instantly - - - Non - commercial instantly €/$25
Dual version Instantly Instantly YES YES NO (single computer) Non - commercial 3 days (on 2 cores) €/$39
5-clients Instantly Instantly YES YES YES, 5 clients max. Non - commercial 1 day (on 5 clients) €/$49
Unlimited Instantly Instantly YES YES YES, any number of clients Any purposes (except distribution) Depends of number
of clients		 €/$150
 
 
 

GuaPDF download and order

 
GuaPDF v. 2.3 Free Demo for Win32, GUI version (140K)
GuaPDF v. 2.3 Free demo for Win32, command-line version (70K)
GuaPDF v. 2.3 Free Demo for Linux (ELF, static, 220K)
GuaPDF v. 2.3 Free Demo for Mac OS X (for Intel, 60K)
GuaPDF v. 2.2 BETA DEMO for Solaris/SunOS (ELF, static, 150K)
 

Please test your file before purchasing

Order the commercial versions over the Internet worldwide using secure connection. This means no one (including us) can intercept your confidential information. The temporarily link to the fully functional version you receive immediately after verifying your order. Normally you'll get the program within 10-15 minutes.

  Service #1, ShareIt (preferred) Service #2, RegNow (if you can't use #1 for some reason)
Name and address ShareIt! element 5 AG Vogelsanger Str. 78 D-50823 Cologne Germany Register Now! P.O. Box 1816 Issaquah, WA 98027 USA
Link Order GuaPDF 2.3 commercial
 Order GuaPDF 2.3 commercial
Connection Secure Secure
Credit cards Visa, MasterCard/Eurocard, American Express and Diner's Club Visa, MasterCard/Eurocard, American Express and Discover
Other methods Bank/wire transfer, check, cash. Fax Check/money order by mail. Fax. Purchase order
  More info More info

Upgrade from 1.x to 2.x OR from restrictions remover to 2-client for $/€ 15.95 here
 
 
 
Customer's FAQ
Q: What version should I choose?
A: Just run DEMO version and it will print it. Briefly, if you can open PDF file, but can not print, edit etc, get the restriction remover version. If you can't even open file, get n-clients version.

Q: I've tested GuaPDF on my file, but got only blank pages (or some errors)
A: It is DEMO version, it can process small files only.

Q: Ok, but how can I sure the full version will work on my file?
A: If DEMO parses your file with no errors, the full version will work fine.

Q: Ok, how long will it take?
A: Restriction removal is instant (may be few minutes on very large files). To estimate key searching time, run DEMO version (and divide it to the number of your PCs).

Q: Are non-standard security handlers supported?
A: No, please run DEMO to make sure your file is supported.

More questions and answers you'll find in the included documentation. 		 
 
 
Support
Only legal customers are supported. No claims and question about freeware version will be accepted, but I'll appreciate the constructive feedback. Also contact me if you have any problems with ordering the program.

Please send any comments and bugs to software@password-crackers.com. In case of the bug reported I'll update program as soon as possible.

You may submit your opinion / read others opinions here. 		 
 
  Last updated: 8 Dec 2007 © Pavel Semjanov, 2000-07