On Friday 21st October, the world witnessed the largest cyber-attack in history. The attack set a new precedent for the size, scale, and potential threat of cyber-attacks; it used the Mirai botnet to corrupt IoT (Internet of Things) devices and repurpose them to conduct a massive coordinated DDoS attack. The attack was registered at a massive 1.2Tbps, and, rather worryingly, there has been speculation that the hackers could have used up 5 times as many devices. Many people have been quick to declare this as the beginning of a new era in cyber-crime, and Elon Musk has speculated that it is “only a matter of time before AI is used to do this”. But how at risk are we?