This tool is designed to dump Windows 2k/NT/XP password hashes from a SAM file, using the syskey bootkey from the system hive.
This package also provides the functionality of bkhive, which recovers the syskey bootkey from a Windows NT/2K/XP system hive.
Syskey is a Windows feature that adds an additional encryption layer to the password hashes stored in the SAM database.