How Does COVID Tracing work?

A couple of weeks ago Canada released the COVID Alert app to the general public. The app is intended to help tracing efforts in the province to curb the spread of COVID-19. Understandably, there are some questions regarding its privacy and security implications. Although I focus here on the Canadian version of the app, the underlying architecture is used by a lot of other public health authorities all over the world. You can find the full…