This is a list of software and ideas developed or maintained by the OpenBSD project, sorted in order of approximate introduction. Some of them are explained in detail in our research papers. Concepts ipsec(4): Started by John Ioannidis, Angelos D. Keromytis, Niels Provos, and Niklas Hallqvist, imported February 20, 1997. OpenBSD was the first free operating system to provide an IPSec stack. inet6(4): First complete integration and adoption of IPv6 led by "Itojun" (Dr. Junichiro Hagino) [WIDE/KA...