For COVID-19 contact tracing technology, proximity-only apps (based on Bluetooth) are more privacy-preserving than apps that use location (based on GPS or cell tower data).

States and public health authorities should avoid any apps that use location.

1/7
That’s one of the reasons why we are so disappointed by Utah& #39;s Healthy Together app, which tracks GPS location data in addition to proximity and cell tower data. 3/7 #stream/0">https://www.kuer.org/post/privacy-concerns-over-utah-s-covid-19-tracing-app-spur-proposal-new-bill #stream/0">https://www.kuer.org/post/priv...
Likewise, EFF does not support app models that gather both location data and proximity data, such as MIT @medialab’s Safe Paths. 4/7 https://safepaths.mit.edu/ ">https://safepaths.mit.edu/">...
Ultimately, however, these technologies are unproven and untested, and must not be a substitute for public health workers’ direct interviews of patients. At best, this technology can serve as only a small part of a larger public health response to COVID-19. 7/7
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