Bill Cheswick logged into his first computer in 1968. Seven years later, he was graduated from Lehigh University in 1975 with a degree resembling Computer Science. Ches has worked on (and against) operating system security for over 35 years. He is probably best known for "Firewalls and Internet Security; Repelling the Wily Hacker", co-authored with Steve Bellovin, which help train the first generation of Internet security experts.