Alarm bells rang out on October 21 when large chunks of the internet in the United States and Europe were made inoperable. This happened because of a specific type of hostile attack, termed “Denial of Service”; this paralyses an organisation’s internet-facing servers (computers) by flooding them with artificially created traffic that has been dramatically scaled up. Here, the pin-point objective was to paralyse an online directory service organisation, Dyn, central to successful internet operation. The attackers hacked and took control of an estimated 100,000 low-end devices that can autonomously access the internet, directing them to overwhelm Dyn — and consequentially paralyse the internet. The Internet of Things (IoT) was involved because the attack exploited very large numbers of ubiquitous low-end devices connected to the internet. This event was a chilling demonstration of the new vulnerabilities that attend the astounding growth of the IoT, and the central role of the internet