Cheswick is a firewall pioneer who published a paper on firewall design and coined the term "firewall proxy". He co-authored a book on firewalls with Steve Bellovin in 1994 (mentioned in the previous slide). In the late 1990s Cheswick worked on a project to map the Internet. This work became the core technology for Bell Labs spin-off Lumeta. Today he is at AT&T Research and is currently working in security, visualization and user interfaces.