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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
++++ (4.19 / 104 votes)
(16660 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 Namo Vipashina Buddha wrote about ver. 2.3 2007-07-16

Very happy with it allowing me to so easily remove the restrictions on print and cut-paste. Now I can print off a hard-copy of various Buddhist Sutras.
My rating:5

User ghost wrote about ver. 2.3 2007-06-27

Possible the easiest and fastst program of its kind. If you can open a file, you can decrypt a file
My rating:5

User XXL wrote about ver. 2.3 2007-05-13

Really good and simple
My rating:5

User mallu wrote about ver. 2.3 2007-05-13

Works like a charm !!!
Simple, Effective and Fast.

No hassles at all. Recommend all to have this one in your ToolBox.

User spudsz wrote about ver. 2.3 2007-05-09

great program works like a charm easy to use.
My rating:5

User cdj wrote about ver. 2.3 2007-05-03

wonderful! the only feature I'd like is a "decrypt this entire folder tree"
My rating:5

User Ton K wrote about ver. 2.3 2007-04-27

Simple, effective and fast. I wish all software was like this! Thanks for the good work!
My rating:5

User ChrisG wrote about ver. 2.3 2007-04-26

An excellent tool, does exactly what is says on the tin. I have used it since 2004 and it has never let me down
My rating:5

User Gil wrote about ver. 2.3 2007-04-10

works fine, removed a print restriction from a pdf in seconds
My rating:5

User Biddley wrote about ver. 2.3 2007-04-10

The "FREE" version doesn't do anything - just blank pages
My rating:1

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