It is one of the most extraordinary heists of all time. In just seconds, an astonishing $1.5bn worth of digital tokens disappeared from a crypto exchange platform. It didn't take long for experts to have their eyes on the targets: a group of sophisticated hackers, working for the North Korean state. So how exactly do they do it? And why is North Korean hacking cryptocurrency anyway? This video from the BBC World Service explains.
How did North Korea steal $1.5bn in crypto?
