CrowdNotifier: Decentralized Privacy-Preserving Presence Tracing ("The Luca App done properly")

https://i62bbb.tm.kit.edu/b/tho-xkh-4ph

2021-11-03

12:30

There is growing evidence that SARS-CoV-2 can be transmitted beyond close proximity contacts, in particular in closed and crowded environments with insufficient ventilation.
To help mitigation efforts, contact tracers need a way to notify those who were present in such environments at the same time as infected individuals.
Neither traditional human-based contact tracing powered by handwritten or electronic lists, nor Bluetooth-enabled proximity tracing can handle this problem efficiently.
In this talk, I introduce CrowdNotifier, a protocol that can complement manual contact tracing by efficiently notifying visitors of venues and events with SARS-CoV-2-positive attendees.
We prove that CrowdNotifier provides strong privacy and abuse-resistance, and show that it can scale to handle notification at a national scale.