Cujo is a friendly looking physical device that protects all of a smart home’s gadgets against hacks, malware, and viruses. When things are fine, the sweetly anthropomorphic Internet security bellwether appears to be resting, “eyes” closed; if trouble hits, however, its “eyes” open up and a user can be sure it’s addressing the threat. When the issue is taken care of, Cujo glances up, then rests soundly and comfortably—just like its owner.