For most people computer viruses, web worms and hacker attacks are an occasional nuisance that they encounter a few times a year at most. It is rare that people have more than one personal encounter with a virus as anyone caught out once tends to work hard to avoid a second infection. But for some security hi-tech workers the job of fighting off viruses and their malicious ilk is a 24-hour, seven-day-a-week task. It is a job that requires constant vigilance and many security firms run network monitoring centres to keep an eye on their customers’ networks and the shifting tide of computer vandalism and crime. The operation centres are the frontline of the information war. Full Story