During the protracted Covid-19 pandemic, more people than ever before have been working from home, paying bills, and socializing using basic Wi-Fi services. Being safe and feeling safe at home are therefore more important than ever.However, the pandemic has also meant that “a lot of services were provided online, and that happened in kind of a rush, so security was an afterthought,” said Apostol...

Achieving so-called zero-power sensors will require harvesting energy from sources in the environment. After narrowing down one’s options to available sources, the next criteria will be the amount of energy available and the amount of energy needed. Solar and wind harvesting can provide a solid foundation for high-power solutions. Heat is often readily available as waste by-product from engines, ...