Are Usability & Security Opposites in Computing?

Not that Slashdot needs the traffic, but they are discussing something that might be of interest to this crowd. “Instinct tells us that computer security and computer usability are inversely proportional to each other…However, there have been plenty of cases where both computer security and computer usability went hand in hand with each other and actually improved together.” They then, without irony, link to a pdf white paper.