Marcus Ranum
CTO
NFR Security, Inc.

Marcus Ranum is CTO of NFR Security, Inc., and has been specializing in Internet security since he built the first commercial firewall product in 1990.

He has acted as chief architect and implementor of several other notable security systems including the TIS firewall toolkit, TIS Gauntlet firewall, whitehouse.gov, and the Network Flight Recorder.

Marcus frequently lectures on Internet security issues, and is co-author of the "Web Site Security Sourcebook" with Avi Rubin and Dan Geer, published by John Wiley and sons.