See also: Good Guys
Aka: Dan(iel) J. Bernstein
DJB is often regarded as one of the pioneers of the Internet. He does research in cryptography, maths, patent laws, computer laws, computer security and other Freedom and computer-related subjects. He is currently employed as professor at University of Illinois at Chicago, Department of Mathematics, Statistics, and Computer Science where does research on various projects.
He also programmed software, most notably the MTA Qmail which is the second most popular MTA on the Internet. He also programmed his own DNS service called DJBDNS and programmed and alternative for SysVinit called Daemontools. His software is released under a non-copyleft license which, whilst it is Open-Source, is not according to the definitions of Free Software.