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Fastest, tested, mostly free password recovery software with benchmarks and review
Other Office → PDF password recovery → Guaranteed PDF Decrypter modified: [2011-10-18]
Password recovery tools
Guaranteed PDF Decrypter (GuaPDF) ver. 3.2
Size: 600K
WinXP-2003; Vista/7; Unix,Linux; Mac
++++ (4.20 / 105 votes)
(16806 downloads)
Release date: [2011-10-16]

by PSW-soft

Benchmarks, passwords/sec

Pentium 4 rate: 12 days (40 bit key) / instantly (removing restrictions)
Core 2 Duo rate: 3* days (40 bit key) / instantly (removing restrictions)
AMD rate : 9 days (40 bit key) / instantly (removing restrictions)
CUDA rate : 1 day
Optimized for Pentium II/III; Pentium 4; Core 2; AMD; Dual; NVIDIA GPU; ATI GPU
 * - on 2 cores
Recommended
fastest
download

buy!
Description:
This is a GUI utility which allows you to instantly remove various operation restrictions on PDF files, such as printing and editing (even with 256-bit key, Acrobat 7.x-10.x AES encryption and compressed files supported). It also can decrypt PDF files with password for opening (40 bit key only), no matter what the length of the password or the language is used. The decryption is guaranteed and takes about 1 day on modern computer. Dual/dual-core/distributed computing and GPU acceleration is also supported.
Attacks:  guaranteed decryption; distributed

Price:  $ 25
    What's new in the latest version:

    Acrobat X encryption support, OpenCL GPU acceleration for both NVIDIA and AMD cards.
Russian Password Crackers review:
First product with GPU acceleration of PDF 40-bit key searching

Users' comments:

User Jim wrote about ver. 2.21 2006-02-06

It allowed me to print restricted documents, which was the reason for buying it.
Therefore it does everything i asked of it.

My rating:4

Author PSW-soft wrote about ver. 2.21 2006-01-22

You're right, there was an error in the support e-mail on the program page. I'm sorry about it. It has been fixed.

User Bernard wrote about ver. 2.21 2006-01-20

After downloading the commercial version of GUAPDF and trying to get support there is none. Support email returned and marked no such address. The forum has not answered any questions. Help directs you to empty html pages. The commercial version did not live up to its guarantee.

User Bernard wrote about ver. 2.21 2006-01-19

Documents are still locked after using GUAPDF. Only printing restrictions were removed. This is the only restriction removed!

User Jim Monahan wrote about ver. 2.21 2006-01-19

I have been using EXCELLENT GuaPDF program since June 2004 (v2.0.) It works, and it works VERY WELL! And in the rare instance that I needed to ask about something, the author answered my e-mails within 15 minutes! Even when it was 4 PM Eastern, which means it was MIDNIGHT in Russia. I prefer to support the small software companies and the individual software authors out there. And the $59 I spent to obtain my 5-client license of GuaPDF was well worth every penny. Thanks!
My rating:5

User Jeff B wrote about ver. 2.21 2006-01-17

GuaPDF is great! Version 2.2.1 decrypted my file instantly!

Note: I tried XXXXXX first but it failed to decrypt my file properly. GuaPDF is the BEST and email support is FAST too!
My rating:5

User David H wrote about ver. 2.21 2005-12-16

I've been using the PDF Decryptor for about 18 months. It is simple and very effective. However, should you require any support from the author you are going to be seriously suprised! The response is almost immediate, polite, concise and outstandingly efficient. Almost like talking to your mate across the room! The author deserves this high praise, it make all the difference to you, the end user...when you hit trouble.
My rating:5

User Abe008 wrote about ver. 2.21 2005-12-02

This software is absolutely the best. Minor bug issue was fixed. I recommend to anyone looking for this software to all. Worth its price and then some. Tech support offered by the Author is awesome. Buy with Confidence. 5 + Stars A++
My rating:5

Author PSW-soft wrote about ver. 2.21 2005-12-01

Demo version is not supposed to process correctly all the pages, it processes only few of them and the decrypted file may contain errors. The goal of DEMO version is to demonstrate your file is parsed correclty and to produce few readable pages without restrictions. Of course, commercial version will generate the file with no errors.

User Eddy wrote about ver. 2.2 2005-12-01

Does nothing with policy server documents... just creates errors!
My rating:1

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