'Surge' in hijacked PC networks

Tuesday, 20 March 2007, 1:37 PM EST

The number of computers hijacked by malicious hackers to send out spam and viruses has grown almost 30% in the last year, according to a survey.

More than six million computers world wide are now part of a "bot network", reported security firm Symantec. Computer users typically do not know that their PC has been hijacked.

At the BBC.

[ Read more ]




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Infographic: 25 years of the firewall

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