Cyberattacks are on the rise, with retail, banking, and airline industries all targeted in recent months. The cost to the economy is huge and thought to be worth billions of dollars. As businesses scramble to stay secure, we investigate the ransomware gangs behind the breaches and the experts working to stop them.

If you'd like to get in touch with the programme, please email us at businessdaily@bbc.co.uk

Presenter: Sam Gruet Producer: Megan Lawton

(Picture: Back of hacker sitting in front of some computer screens. Credit: Getty Images)