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{ Program ZIPCRACK Copyright 1993 by Michael A. Quinlan               }
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{ Brute force attack on PKZIP V2 encryption.                          }
{ Based on the APPNOTE.TXT distributed with the registered version    }
{ of PKZIP 2.04g.                                                     }
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{ Method: Generate all possible passwords; invoke PKUNZIP -t (test)   }
{ option to test each password.                                       }
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{ Input: Minimum and maximum password lengths, password character set,}
{ Zipfile name, name of file to extract.                              }
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{ Options: Interval to save last password attempted; this allows the  }
{ program to be restarted.                                            }
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{ Performance improvements: placing PKUNZIP and the Zipfile on a RAM  }
{ disk will improve speed. Increasing the 'save' interval will also   }
{ increase speed. Making the current directory a RAM disk is _NOT_    }
{ recommended, since a crash (power hit, etc.) will lose the saved    }
{ 'last password' and you will have to restart from scratch.          }
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