The TCP/IP stack made it easy for billions of devices to connect over the internet in just a few decades, starting in the 1990s. Now we’re expecting more than 75 billion devices to be connected by 2025. Maybe TCP/IP was too good at its initial mission to ensure easy, rapid connectivity. But that’s just chapter one of the emerging cyber security problem.
Chapter two is even bigger, from both an opportunity and damage standpoint. The key to understanding the risk isn’t to quantify it in terms of more infected computers but rather unauthorized control over physical environments. Bruce Schneier takes us there in his new book Click Here to Kill Everybody: “The Internet, once a virtual abstraction, can now sense and touch the physical