Summary Extended coverage of rainbow tables and Ophcrack software. Rainbow tables are precomputed hashes of files, so Rainbow tables allow a simple 'lookup' between a table and a hash. 6:08 - Ophcrack usage Reference Materials http://ophcrack.sourceforge.net/ - Ophcrack Homepage http://ophcrack.sourceforge.net/download.php - Ophcrack Downloads http://sourceforge.net/apps/mediawiki/ophcrack/index.php?title=Ophcrack_Howto - Ophcrack Howto http://sourceforge.net/apps/mediawiki/ophcrack/index.php?title=Frequently_Asked_Questions - Ophcrack FAQ Additional Information Biometrics: Authenticating by who you are ...