New anti-virus software easily enables companies to read e-mails, track Web surfing, and monitor content moving in and out of corporations.

"Security software is a very competitive market and most vendors have now moved in to anti-spamming solutions and content filtering," Nancy Ho from security specialists Trend Micro told CNN.

"And after the Blaster and SoBig worms we have received a lot of interest," adds Hong Kong-based Ho.

Media attention, fear and uncertainty is fuelling sales of IT security products, as is the need for better corporate governance in the light of the Enron scandal and the Sarbanes-Oxley Act in the U.S.

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