More proximity for more efficiency

[ibstelix]

Since a trusted server is accepted in this project why not let each user (A) "draw" a cercle (of 2m radius) around him[her]self and monitore each in and out of other users (X) in his circle. If a user stays more than 60sec in his circle then record the "[temp]ID" of that user ?

If "A" moves to another aera without someone entering his circle then that position is not saved.

That makes more traffic between users and the trusted-server but is more efficient because only real contacts are recorded.

With the bluetooth many false contacts because no way to assess the distances (or am i wrong ?)

[beng-git]

Are you talking about using a GPS to draw this circle ? This goes against the principle of data minimization since actual positions will be queried/stored (i.e. the location you drew the circle at). There are studies on how BT correctly assesses (or not) distance, see for instance : https://github.com/opentrace-community/opentrace-calibration/blob/master/Trial%20Methodologies.md which was designed for the TraceTogether app.

[pelinquin]

see https://adox.io/bulle.pdf

[vaudenay]

Génial!
Enfin une bonne raison de buller.

[PRIVATICS-Inria]

Excellent ;-)