We designed a platform trying to take into consideration each and everyone of these value points. The result is a platform for National authorities and citizens that, through an app, provides an accurate contact tracing of people to people and people to places, enforcing citizens’ privacy and security.
It relies on Bluetooth (BLE) - we believe it is the right technology for this purpose - and works with distributed computing, without sharing citizens’ personal information with the central node of the system. This architecture enforces stronger privacy and, at the same time, it’s light enough to ensure scalability to handle millions of users and background operations.
The system tracks the contact between people, preserving their anonymity and works like a health-badge for them.
This is probably the same function you've seen in other's solutions in the news. The true value is given by the introduction of a risk index.
Through an algorithm that relies on smartphone local logs, each user is given a risk index according to the probability of having been infected. Higher values mean a high chance of having the virus.
Every time someone’s index will go over a certain risk threshold, he/she must be tested and in case put under quarantine. Higher index people should be tested first as they are more likely to have the virus.
It’s entirely in the hands of the Healthcare System and the Government to set and control thresholds. Those decisions can depend on different factors like resources availability (swabs, fast test kits, medical personnel, etc) or strategic conditions.