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Page last updated at 08:55 GMT, Wednesday, 10 November 2010

The growing threat of cyber crime

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The British government says cyber crime is now one of the biggest risks to national security. A new cyber crime unit is to be set up which will both defend from and be able to attack other nations.

As more of the world comes online, so the number and location of PCs available for hijacking is changing.

Spencer Kelly investigates what the latest threats look like, and how they can be avoided.

Read more: How to avoid the fake security tool scam

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