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Apple and google’s system apparently doesn’t store location information. Actually it’s getting pushback from health people because it doesn’t collect data.
by bo1024 6y ago
Apple and google’s system apparently doesn’t store location information. Actually it’s getting pushback from health people because it doesn’t collect data.
- walterbell 6y agoIt can be used to derive phone/human proximity data, which can be cross-referenced with other metadata.
- conradev 6y agoIt can’t be because the database does not exist: it is sharded onto each individual phone The server only has a list of random identifiers from those who have tested positive for COVID. An exposure notification is determined when a phone downloads that list and correlates it with its local list.
- walterbell 6y ago> when a phone downloads that list After exposure, a time-bounded (?) graph of proximity contact data can join the central list, via the state health app using the local data. This can be cross-referenced with other metadata. Once a human contact tracer establishes communication with the owner of a phone's random identifier, the identifier can be de-anonymized. Even without the new APIs, each phone's location can be collected and shared by telcos, at the granularity of cell tower triangulation.