Mobile apps and wearables (in the future) that deploy the BlueTrace protocol are able to blend decentralised and centralised models of contact tracing. The collection and logging of encounter/proximity data between devices that implement BlueTrace is done in a peer-to-peer, decentralised fashion, to preserve privacy. At the same time, the analysis and the provision of epidemic control guidance is done centrally by a trusted public health authority, committed to driving adoption. Sovereignty is respected through a federated model among a network of participating countries and public health authorities.
BlueTrace manifesto: https://bluetrace.io/
BlueTrace Manifesto: https://bluetrace.io/