Compromised PCs will continue to pose network security problems, despite increased spending by businesses on anti-virus software, according to analyst firm Gartner.
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The amount spent on anti-virus software is predicted to rise by 10.7% in 2007, said Nicole Latimer-Livingston, principal research analyst at Gartner.
However, changing threats mean that there needs to be a long-term shift away from relying on signature-based anti-virus defences to more predictive and proactive security, she said. Managing the problem of compromised computers will come to the fore as part of this.
Dave Rand, chief technical officer of internet content security at anti-virus supplier Trend Micro, said, "The number of compromised computers sending spam has nearly tripled in the past year in the UK.
"Workstations on the network could all be protected with enterprise-class anti-virus software, but it only takes one PC to eat up bandwidth after it becomes infected with a bot [a hidden application that runs automated tasks over the internet]."
Attacks using bots are expected to rise in 2007, according to research commissioned by network security provider Postini. More than one million IP addresses are coordinating spam and virus attacks in this way each day, it said.
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