US is taking a state-by-state approach to COVID-19 contact tracing apps, which could cause security and privacy issues in addition to hindering interoperability (Andy Greenberg/Wired)

Andy Greenberg / Wired:
US is taking a state-by-state approach to COVID-19 contact tracing apps, which could cause security and privacy issues in addition to hindering interoperability  —  With no nationwide Covid-19 notification software in sight, security and interoperability issues loom large.