You are making a lot of assumptions, basically your story summarise as: - A and B connect from same home network with their apple IDs - B checks location of so

You are making a lot of assumptions, basically your story summarise as: - A and B connect from same home network with their apple IDs - B checks location of someone (you assume it is A) - so we have A’s coarse location Depending on implementation details, this randomIDs you mentioned not needed to be same when submitting and querying (and probably not)