PDF Password Rescuer Technical FAQ:

1: Q:What is PDF Password Rescuer? What can it do for me?

A: PDF Password Rescuer is a fast password recovery tool which can help you get access to password protected PDF document by instantly removing the restriction and recover the open password.

2. Q:What versions of PDF does it support?

A: PDF Password Rescuer support all versions of Adobe Acrobat or other PDF software.

3. Q:What is the system and hardware requirements of PDF Password Rescuer?

A: PDF Password Rescuer is compatible with Windows 8.1/8/7/Vista/XP/2016/2012/2008/2003/2000(32-bit or 64-bit) even the newest Windows 10 and Windows Server 2019;

Computer hardware requirements:

1 GHz processor (2.4 GHz is recommended);
128 MB of RAM (1 GB is recommended);
4 MB of free hard disk space.

4. Q:What is brute-force attack?

A: It will try all possible characters combinations in the specified Range. You can select the range from Brute-force "Range" and "Lenth" options. The password recovery engine is highly optimized, thus short and simple password can be recovered immediately.

5. Q:What is brute-force with mask attack?

A: If you remembered the password partially you can set a mask with the mask symbols for those parts you can't remember, it will only try the characters combinations which contain your remembered characters and help you effectively shorten the recovery time.(High Recommended)
You can define the search range more accurately. Give the symbols you remembered, replace the unkown symbols with "?". Such as ac???ab. A Password Mask must be defined when you choose Mask Attack. If you partially know the password and confirm the character position, this Attacking method can help you find out the correct password easily.

6. Q:What’s "Character Set"?

A: It is only available to "Brute-force with Mask Attack" which instructs the program what characters have been used in the password and restrict the search area.
a-z, 0-9,A-Z, -_?!@#$... : Defined by the Predefined Passwords Ranges. If the password contains these, check it.
User-defined : You can define your own Character Set for the Brute-Force Attack. Check "User-defined" and enter the Character with your own.
Start from : If you remember the beginning of the password characters check it and enter the Character.
End at : If you remember the end of the password characters check it and enter the Character.

7. Q:What is "Dictionary Attack"?

A: Most passwords used by living beings are based on a word or phrase. Performing a dictionary attack by attempting different combinations of cases and variations of words and characters before reverting to a comprehensive brute-force attack allows for considerate time savings shall the attack succeed.

8. Q:What is "Smart Attack"?

A: PDF Password Rescuer attempts all possible combinations of passwords by performing the brute force attack. The highly optimized low-level code provides the best-in-class performance for the brute-force password recovery. Multi-threaded optimization ensures optimum performance on the modern multi-core CPUs. If you choose this attacking method, character range and mask symbol cannot be defined, user can only define how long of the password in Lenth Option.

9. Q:What is the "Program Priority"?

A:Changing Program Priority allows you to control the allocation of processing resources on your computer. By default, all processes are at normal priority.
Idle priority means that PDF Password Rescuer will not interrupt other programs, so attacks will not decrease the performance of other running applications.
High priority means that PDF Password Rescuer will use all available system resources. The performance of other applications will degrade but PDF Password Rescuer will work as fast as possible.

10. Q:What if I stop recovering the password?

A: The program will save the recovery process automatically. And it will run again following that point even if it was suddenly suspended. You can set the period in Auto-save Option. If you set it as 5 minutes, then the program will automatically save the process every 5 minutes. Select the check box "Save project every" to active it.

11. Q:What's the difference between the trial version and full version?

A: PDF Password Rescuer can only view 3 or less characters of open password, but cannot remove the restriction. We do not guarantee thorough technical support for users of the trial version. Purchasers of the full version of the program can receive guaranteed priority technical support.