GCHQ in Cheltenham, Gloucestershire
Media playback is unsupported on your device
Video

GCHQ in Cheltenham helps businesses fight cyber crime

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".