Before networks, we password-protected computers. When the Department of Defense research project DARPA started connecting us, worms, viruses, and other malicious activity appeared. A NASA researcher invented the firewall. Hackers organized into groups and evolved faster than security solutions.
Eventually the perimeters we all protected stretched until they broke: by 2023, there will be three times more networked devices on Earth than people. Which leaves us a new question: did we really connect everyone and everything without a plan?