There’s nothing quite like a computer security convention to stoke your impending sense of doom. Amid war and pestilence, the most gloomy sector of the high-tech economy gathered for the RSA Conference and Expo in San Francisco on Monday to remind us that it’s worse than we think. Oddly enough, it’s this depressing sector which has generated the most optimism for an increase in tech spending. While most of the tech industry is still in the dumps, the conference and trade show to promote digital security products and services generated plenty of interest this year, with attendance estimated at about 10,000. The combination of war in Iraq, terrorism threats and recent hacker attacks have heightened awareness — and worries — over the security of computer networks.“People finally woke up last year and realized we’re vulnerable,” said Michael Rasmussen, a security analyst for Forrester Research, during a morning panel. Full Story