Password Cracker
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Ophcrack
Ophcrack - Open Source Password Cracker
Ophcrack is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms.
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John the Ripper
John the Ripper - Open Source Password Cracker
John the Ripper is a fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS.
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