new in-depth analysis of #GoogleApple #ContactTracing apps: "[The #Google part]... seems to call home every ~20 minutes and shares the handset IMEI, SIM serial, phone number, email address and WiFi MAC address and lots of still-to-be-decoded data with Google. (Presumably more detailed app telemetry.)" https://www.scss.tcd.ie/Doug.Leith/pubs/contact_tracing_app_traffic.pdf