Donald L. Pipkin is a Security Systems Architect for the Internet Security Division of Hewlett-Packard. Don is a noted security expert with fifteen plus years experience in the industry. He is a frequent speaker on the topic both regionally and internationally. He is also the author of Halting the Hacker: A Practical Guide to Computer Security, a contributing author of Unix Security, and he has written security articles for computer publications such as SysAdmin magazine.