The virus will spark new surveillance tools. Imagine a test-trace-isolate system where NFC broadcasts a temporary certificate to ~6ft. Responsible citizens cache those semi-anonymous certs for 14 days so new cases can be traced with minimum privacy violations. Ala Thinthread
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I looked into developing an app to help mobile users stay 6ft apart. Unfortunately none of the sensors I looked in to would be suitable. NFC, Bluetooth, UltraSonic, Wifi all unable to provide right sensitivity and specificity.
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Can that be done without a trusted oracle dispensing keys? I guess if you rely on low-power transmission of keys, but that can be relayed and disclosed.
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