OpenBSD Security - Official OpenBSD security advisories. Secure Internet Servers/Firewalls with OpenBSD - Outline notes for the half-day tutorial presented at the O'Reilly Open Source Conference in Monterey, California on July 17, 2000. Dealing with Public Ethernet Jacks - Whitepaper from the University of Alberta on using OpenBSD to block unauthorized users on unprotected Ethernet jacks. Hardening OpenBSD Internet Servers - Tutorial on hardening and improving security on OpenBSD systems. Cryptography in OpenBSD: An Overview - Whitepaper presented at USENIX 99 by OpenBSD developers Theo de Raadt, Niklas Hallqvist, Artur Grabowski, Angelo D. Keromytis, and Niels Provos discussing the cryptography employed in OpenBSD. Future-Adaptable Password Scheme - Whitepaper by OpenBSD developers Niels Provos and David Mazières discussing ways of building systems in which password security keeps up with hardware speeds. OpenBSD Packet Filter (pf) - Information regarding history and design of the new OpenBSD packet filter (pf). Design and Performance of the OpenBSD Stateful Packet Filter (pf) - This paper from Usenix 2002 describes the design of the new OpenBSD packet filter (pf) and compares performance of stateful vs. stateless filtering.