GCHQ in Cheltenham, Gloucestershire
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GCHQ in Cheltenham helps businesses fight cyber crime

6 September 2012 Last updated at 12:15 BST

GCHQ, the government spy base in Cheltenham which gathers intelligence, is helping businesses to fight cyber attacks.

Research suggests cyber crime costs the UK economy £21bn a year.

GCHQ says companies are vulnerable to online attacks and their advice "should prevent 80% of security breaches".