On April 16, 2020, Nodle released The Whisper Tracing Protocol white paper[1] and the Coalition App on Android.
[2] The protocol is intended to be a privacy first Digital contact tracing tool developed for the 2020 COVID-19 pandemic.
It was started by a handful of digital professionals and subsequently brought together nearly 500 volunteer experts from the private, public, and civil society.
Smartphones running the protocol record "proximity events"[7] which may include the Temporary ID of the user in contact, time, signal strength, location, and other metadata.
A key difference with other Digital contact tracing tools is that the Contacttracing happens locally on the phone, meaning that the system does not need to transmit location, or all of the user's proximity events to a server.