cyber-attack on a steel maker in Iran two weeks ago is being seen as one of those significant and troubling moments. It’s extremely rare for hackers, who operate in the digital world, to cause damage in the physical world. Iran has been the victim of a spate of recent cyber-attacks that have had an impact in the real world but nothing as serious as this. A hacking group called Predatory Sparrow said it was behind the attack, which it said caused a serious fire, and released a video to back up its story. Are the hackers changing tactics to be felt on the outside world ?

