Further deep links to the technical side:

https://covid19-static.cdn-apple.com/applications/covid19/cu... Cryptographic Specification

https://www.blog.google/documents/55/Android_Contact_Tracing... Android API

There's a presentation linked at the bottom which explains in brief how contact tracing will work:

https://blog.google/documents/57/Overview_of_COVID-19_Contac...

Apple and Google should have included the chart in their announcements, IMO. It illustrates the process in a way that's easier to understand than text alone.