Folgende Fehlermeldung hat mich überzeugt, daß Microsoft doch an Sicherheit denkt 
http://support.microsoft.com/kb/q276304

http://support.microsoft.com/kb/q276304
Your password must be at least 18770 characters and cannot repeat any of your previous 30689 passwords. Please type a different password. Type a password that meets these requirements in both text boxes.