"NF: OpenBSD is considered one of the most secure operating systems currently available. What approaches do you take towards security?
"TdR: We've had 10 years of nearly fanatical devotion to anything which can make OpenBSD more secure. A very important part of that is that we have not been afraid to completely overhaul anything even if it breaks backward compatibility. Secondly, when we have found a flaw in any part of the system we have assumed that the same mistake was made elsewhere, and gone on a hunt to fix them all. Thirdly, we have developed and incorporated a collection of methods that make software flaws very difficult to attack..."