This content is 19 years old. I don't routinely update old blog posts as they are only intended to represent a view at a particular point in time. Please be warned that the information here may be out of date.
I just read a very interesting article on password cracking techniques on the IBM website. It doesn’t contain any information that isn’t already well known, but it’s still a useful summary of some of the issues which an administrator should be prepared for and how to prevent them.