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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
++++ (4.18 / 107 votes)
(16836 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 Billyray wrote about ver. 3.2 2013-06-19

Very good program. I had the user key, but couldn\'t remove restrictions due to lost password. Thanks!

User Ahn wrote about ver. 3.2 2013-04-30

Good Good
Very Good
It's so useful!~!
My rating:5

User Robert wrote about ver. 3.2 2013-04-12

Didn\'t work on my PDF file. Got the error message \"Not a PDF file. Startxref not found.\" but it *is* a PDF file, it opens in Viewer. :P :P :P

User spokey wrote about ver. 3.2 2013-04-12

Pretty good so far. Removes password quickly.

Would get five starts if I could select several files on the open
My rating:4

User mikeb wrote about ver. 3.2 2013-04-04

Excellent tool - It opens PDF files that other decryption software fails to open because of "no objects table".
My rating:5

User A new user wrote about ver. 3.2 2013-03-20

Demo is too restricted - not even uncryting one page - but the full version does the work quickly and is very affordable.
My rating:4

User mariof wrote about ver. 3.2 2013-03-11

Fantastic utility. Simple, fast, efficient. 5*!
My rating:5

User ECarter wrote about ver. 3.2 2012-10-24

Wow, something that actually works just like it says it will. This is wonderful--and very inexpensive!
My rating:5

User GinaFL wrote about ver. 3.2 2012-09-06

Works great! Exactly what I needed.
My rating:5

User DOC wrote about ver. 3.2 2012-08-23

How can I updated my ordered version without costs like permitted ?
My rating:5

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