Hello. I came up with an idea about contact tracing system after had seen Singapore govt. solution(TraceTogether). So I want to share you all might need this kind of solution for infection suppression before testing. I posted on blog: https://kaz184.wordpress.com/2020/03/23/rapid-anonymous-contact-tracing-system/
Scientific data used in the post comes from Japanese govt. epidemiologists team, so there is some differences from WHO or your scientists. But I believe the basic concept can be recycled to fit in your use.
There is 2 crucial differences from TraceTogether.
Phone number is not needed
You don’t need to give your phone number to the authorities. TraceTogether uses phone number to send notification to users who have close contacts with infected. But by using only public key, we can notify those people without using any private data like phone number. It also makes us possible to track down multi-step further to n-th generation of an infected without any private data. This will also reduce the cost of private data management by the authorities.
Completely independent from the authorities
Clients just download the notices(encrypted tokens) from and send their contact history to the server based on their policy. This also means clients and servers can be implemented independently if protocols are compatible. This gives the users full dignity of their own data without any negotiations to the authorities.
How do you think about the decency of this idea?