蜜芽传媒

For some years we've been hearing of concerns from governments around the world that a major international "cyber-war" - one nation taking measures to stop the computer-system of another country from working properly - is just around the corner. And earlier this month, US Defence Secretary Ash Carter hinted strongly that the US and Western allies had stepped up cyber attacks against Islamic State militants especially in Syria.

Fred Kaplan is a leading columnist and commentator on diplomacy and US security for the American website Slate. In his new book Dark Territory, he examines the hidden history of American involvement in cyber-warfare.
Weekend's Julian Worricker put it to him that most people think of cyber-war as a relatively recent concept but that actually it dates back a good deal further?
(Photo:The US Pentagon. Credit: Andrew Caballero-Reynolds/AFP/Getty Images