Apple and Google announced that they are building Privacy-Preserving contract tracing into iOS and Android for tracking the coronavirus spread, using Bluetooth Low Energy (BLE) transmissions. This is how it works
The 32-byte tracing key is derived in the OS layer and never leaves the device; whereas A Daily Tracing Key (generated every 24-hour) derived on the device from the Tracing Key gets uploaded to the cloud.
This would be the most reliable way to figure out who an infected person has been in contact with and thus preventing further spread.
It is great when Technology companies, developers and governments working together to solve one of the most pressing problems we have at the moment, and It is fascinating to see how technology is evolving to become one of the many pillars of our civilization.
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