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".