An organisation can put a swathe of security products in place to protect against external threats, but if there's a person working from the inside to steal information, those digital walls are basically useless. That's the nature of insider threats; the human element can be unpredictable and difficult to fight against.

Traditionally, it's an IT department's responsibility to deal with insider threats, given information is predominantly stolen through the use of technology. But high-profile security expert Keith Lowry, who was tasked with investigating Edward Snowden, believes that IT shouldn't be solely responsible because it undermines the human element of insider threats.