- Q 1. What can I do with this tool?
Q 1. What can I do with this tool?
A: PDF Password Unlocker is a useful PDF password recovery utility to recover passwords for encrypted PDF files (*.pdf) created by Adobe Acrobat or other PDF apps.
- Q 2. How long it will take to recover passwords with this program?
Q 2. How long it will take to recover passwords with this program?
A: It depends. This program allows you to recover PDF password through Brute-force, Brute-force with Mask and Dictionary attacks. As for the recovery time, it may take you from minutes to days depending on the recovery speed of your password recovery tool, lost password strengthen (password length and complexity), your computer performance, etc.
With PDF Password Unlocker, you can enjoy faster recovery speed than other similar tools using unique and advanced search algorithm. What’s more, it allows you to recover faster with NVIDIA and ATI GPU, Multi-core CPUs and SSE technologies.
- Q 3. What do I need for GPU acceleration?
Q 3. What do I need for GPU acceleration?
A: The product will automatically use GPU acceleration as long as your computer has NVIDIA CUDA GPUs or ATI OpenCL GPUs. No other item is needed.
GPU: Graphics Processing Pnit, also occasionally called visual processing unit (VPU), is a specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate the building of images in a frame buffer intended for output to a display. Their highly parallel structure makes them more effective than general-purpose CPUs for algorithms where processing of large blocks of data is done in parallel.
Nvidia is best known for its graphics processing units (GPUs). Nvidia and chief rival AMD Graphics Technologies (formerly ATI Technologies) have dominated the high performance GPU market, pushing other manufacturers to smaller, niche roles.
- Q: 4. What do “Customize characters”,” Specify prefix” and Specify suffix” mean in Brute-force with Mask settings?
Q 4. What do ‘Customize characters”, Specify prefix” and Specify suffix” mean in Brute-force with Mask settings?
A: Customize characters is provided to define your own character set which has been used in the password.
Specify prefix refers to the first one or several characters of the lost password.
Specify suffix refers to the last one or several character of the lost password.
If you can remember some characters of the lost password, but not sure whether the password starts or ends with these characters, please check the box in front of Position variable/floating.
- Q 5. What does “Smart Mutation” mean in Dictionary attack settings?
Q 5. What does “Smart Mutation” mean in Dictionary attack settings?
A: Mutation Count allows you to choose a number, that number means you can try combinations among the passwords in dictionary. For example, you choose 2, and then the program will try combinations between every two passwords in the dictionary after trying every password.
By default, smart mutation is 1, and the software will try every single word in the dictionary.
- Q 6. Can I create my own dictionary in Chinese or other languages?
Q 6. Can I create my own dictionary in Chinese or other languages?
A: Of course, you can. The Dictionary attack in this program allows you to use your own dictionary using various languages, including Chinese, English, French, Japanese, etc.
As for how to create your own dictionary, following is a created Dictionary file figure as your reference.
- Q 7. I added my own dictionary to the program, but why does the program still use the default dictionary when I run the program?
Q 7. I added my own dictionary to the program, but why does the program still use the default dictionary when I run the program?
A: It will be ok if you empty the path of the default dictionary.
- Q 8. What if I stop recovering the password?
Q 8. What if I stop recovering the password?
A: The program will save the recovery process automatically and resume the process when you run the program again even though the recovery process is suspended.
- Q 9. I cannot find the place to register the program, what to do?
Q 9. I cannot find the place to register the program, what to do?
A: After payment, a registration code will be delivered to you via email soon.
Step 1. Run PDF Password Unlocker.
Step 2. Click Help and select Register. It will prompt a dialog for entering your registration code.
Step 3. Enter your registration code and click OK to finish the registration process.
- Q 10. What versions of PDF does it support?
Q 10. What versions of PDF does it support?
A: It recovers open password from encrypted PDF files (*.pdf) created with all versions of Adobe Acrobat (exclude Adobe Acrobat X) and other PDF applications.
- Q 11. What is the system Requirements of PDF Password Unlocker?
Q 11. What is the system Requirements of PDF Password Unlocker?
A: Support Microsoft Windows 2000/2003/2008/ XP/Vista and Windows 7 (32-bit or 64-bit)
1 GHz processor (2.4 GHz is recommended)
512 MB of RAM (1GB is recommended)
15 MB of free hard disk space
- Q: 12. What’s the difference between the trial version and full version?
Q: 12. What’s the difference between the trial version and full version?
A: For Brute-force and Brute-force with Mask attacks, trial version can only recover the first three characters of the password.
For Dictionary attack, the trial version can only check 10000 combinations in the dictionary as possible password.
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