1. LAN Manager is the older file server product from Microsoft and IBM. The details of this aren't all that important except that backwards compatibility has introduced security holes in products 10 years later. LAN Manager authentication splits a password into two case-insensitive parts that are 7 letters each. Therefore, if your password was "RobertGraham.com", under LAN Manager it would be the same as "ROBERTG RAHAM.C". Whereas new products like Win98, WinNT, and SAMBA support newer/stronger authentication methods, the need for backwards compatibility often exposes the LAN Manager password, which can easily be cracked. From Hacking-Lexicon