13 ms·
Yes, this is where OP lost me. > Published keys are 16 bytes, one for each day. If moderate numbers of smartphone users are infected in any given week, that's
by jeremyjh 7y ago
Yes, this is where OP lost me.
> Published keys are 16 bytes, one for each day. If moderate numbers of smartphone users are infected in any given week, that's 100s of MBs for all phones to DL.
"Moderate" rate of infections is not millions of new cases per week worldwide. That would be such a catastrophe that contact tracing would be useless.
- ralfd 7y agoCurrently there are 1.2 million active infections. Doesn’t this mean every smartphone in the world would need to download 17 MB per day? If more cases would be tested in India or Africa or Sputh America a ten fold increase wouldn’t be unthinkable.
- tinus_hn 7y agoThe downloads are mediated by country specific apps. You don’t need numbers from the whole world.
- jeremyjh 7y agoNo, my understanding is you only would download two weeks worth of keys when a new infection is reported. There is an assumption in any method of contact tracing that once people test positive that they are isolating themselves. If they don't, there is no reason to do the tracing since the virus will simply spread exponentially.