The global rise of ransomware

How hackers stole millions from companies around the world, and why they're so difficult to stop. Chris Fox speaks to Jen Ellis from cybersecurity firm Rapid7 and to Tom Pace from NetRise about the growth in ransomware attacks in recent years, and why companies often feel they have no choice but to pay large ransoms. And Joe Tidy travels to Russia in an attempt to track down alleged ransomware gang members.