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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)
(16776 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 sara.norton1@ntlworld.com wrote about ver. 2.21 2006-07-16

Absolute genius! I`m a novice and this download actually worked, which is a first for me! Easy to use, no jargon, and actually gives results!!!! Thank you soooo much, i`d recommend this to anyone!
Not sure if i can disclose this, but i`m going to anyway! Used this program to access my wedding photo pdf. Couldn`t have printed my photo`s without you. Would have had to pay god knows how much for copyright reprints of me!!!
Thanks again
sara
My rating:5

User A NEW YORK ATTORNEY wrote about ver. 2.21 2006-07-16

Excellent product. Does what it is supoosed to do. Nice feature that that this utility does not have to be installed on the user's workstation, thereby reducing the likelihood of conflicts with other programs. 5 client program is best buy for most small commercial users.
My rating:5

User Jay wrote about ver. 2.21 2006-06-27

Works as decribed. Very good program. We received immediate response when asking questions.
My rating:5

User JP wrote about ver. 2.21 2006-06-22

Thank you very much!
I had a very good technical support.
My rating:5

User Pablo (Uruguay) wrote about ver. 2.21 2006-05-29

I bought it for restrictions removal, works great!
(btw: have not tested the password functionality)
My rating:4

User Kirk wrote about ver. 2.21 2006-05-25

This was exactly what I was looking for! An inexpensive piece of software that removed the print restrictions almost instantly. Many thanks!!
My rating:5

User china wrote about ver. 2.21 2006-04-29

your GuaPDF is a good stuff. but still has some bugs:
1.if the pdf has bookmarks,the bookmarks fonts and link will changed when it decrypted.....
2, it seems not support asian languege pdf......

User Ante wrote about ver. 2.21 2006-04-29

It is good for poor people
My rating:3

User Dave wrote about ver. 2.21 2006-04-11

The program (I got the full $42 version) instantly removed the restrictions in my document. Thanks!
My rating:5

User Raphael wrote about ver. 2.21 2006-02-07

I purchased the restriction remover version and it just worked like a charm on my PDF files. As mentioned by others, the author deserves compliments for his promt answers to my questions. This program is a must ! Support it by buying it !
My rating:5

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