PRP was developed by KpGb Software. PRP is part of CCZip Pro.

Password Recovery Program (PRP) Version 1.0  (Oct 30, 1997)

This program does not have any help file yet, but hopefully it is fairly
self explanatory.  The purpose of PRP is to help you with zip file
passwords that you can't quite remember.  You know most of it but you
aren't too sure about a few of the characters in the password.  Just
enter the characters into the positions that you do know and let PRP
find the rest of them for you.

You can let PRP find the entire password for you, but I personally feel
that this would take way too long, especially if you don't even know
how long the password is.  It would take days to find a moderately long
password without knowing any of the characters and, as I said, especially
if you need to test a range of password lengths too!!!

Here's basically how you use PRP:

1) Start it up.

2) If you know the exact length of the password, enter that number into
   both the Min and Max password length edit boxes.  If you don't know
   the exact length, enter the minimum password length to test into the
   min box and the maximum length to test into the max box.

3) Enter the range of ascii values that should be tested for each position
   that you do not know the value for.  The default is set to test for all
   known printable ascii values.

4) If you do know some of the values for some of the positions in the
   password, check the "Use Known" check box and then enter the known
   value for each known poaition.

5) Select the known positions using the up and down arrows under the 
   Position label.  Then enter the value into the edit box under the
   Value label.  If you can simply enter the character directly, then
   leave the 'Letter" radio button checked.  If the known value is
   not a printable character then click the "Ascii Value" radio button
   and enter the numeric ascii value for that position.  Each time you
   enter a value, click the Set button to remember that value for that
   position. 

6) If you need to clear a value that you previously entered, set the
   spin edit to the correct position and press the Clear button.

7) Click the "Open Zip" button on the tool bar.  Find the zip file that
   you want to do a password search on in the file open dialog box. When
   you have selected a file, the encryped files in that archive will show 
   up in the combo box at the bottom of the form.  If there are no encryped
   files then the combo box will be empty.

8) All of the files in the archive MAY have the same password or they may
   have different passwords.  Select the file that you wish to perform
   the password search on by selecting it in the drop down combo box.

9) OK, you're ready to go!  Infact that is all you need to do is press
   the Go! button on the tool bar and PRP will start testing passwords
   against the selected entry in the zip file!

10) As the passwords are being tested, every 500 passwords the form
   statistics will be updated.  The password currently being tested (every
   500th password that is) will be shown along with the number of passwords
   tested so far.  The elapsed time will also be shown, but I am not sure this
   is working correctly yet.

11) When the password has been found, the ascii value for each position
   will be listed in the large list box in the middle of the form.


If you have any problems with PRP, please let us know.

Thanks and if you have any suggestions let us know!