For the record, there's also a community-edited research document summarizing various contact tracing technologies: "Unified research on privacy-preserving con

For the record, there's also a community-edited research document summarizing various contact tracing technologies: "Unified research on privacy-preserving contact tracing and exposure notification" - https://docs.google.com/document/d/16Kh4_Q_tmyRh0-v452wiul9oQAiTRj8AdZ5vcOJum9Y/edit?ts=5e801c37 https://docs.google.com/document/d/16Kh4_Q_tmyRh0-v452wiul9o...