The Apple / Google API has exactly two inputs: Whether there is another phone near to yours for some length of time, and whether the user of a phone has entered that they had a positive test. It has exactly one output: it will inform you if your phone was near another phone for some length of time, whose owner entered that they had a positive test.
The identity of the phones involved is cryptographically hidden. No data is shared, except data that allows a phone to detect that it was close to an “infected” phone which cannot be used by anyone to identify the phone, except the phone itself.
No data that could be exploited in any way is Ever collected or stored, therefore it cannot be abused. No data that could be used To identify a person or anything about them is ever known to the app, so no such information can be used for any discrimination.
Biting the hand that feeds IT
