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(For a tweet-sized take: https://twitter.com/sanchom/status/1250508266171437056) Apple and Google have collaborated to create specifications for tracing COVID contacts using Bluetooth and cryptography ( https://covid19-static.cdn-apple.com/applications/covid19/current/static/contact-tracing/pdf/ContactTracing-BluetoothSpecificationv1.1.pdf, https://covid19-static.cdn-apple.com/applications/covid19/current/static/contact-tracing/pdf/ContactTracing-CryptographySpecification.pdf). These protocols look like they would actually preserve privacy. Your phone would generate a unique key each day. Your phone would also generate and transmit a unique ID (based on the […]