To better understand privacy attitudes toward contact tracing apps, we surveyed subjects (total n=200) on two dates in early April. https://seclab.cs.washington.edu/wp-content/uploads/2020/05/contact-tracing-user-privacy.pdf (PDF) I thought some of the preliminary results were telling. 1/

Even with a hypothetical guarantee of "perfect" privacy, ~72% of participants said they were at least "somewhat likely" to download a contact tracing app. That number dropped significantly as we introduced the possibility of imperfect privacy. 2/

It mattered to participants who was behind the effort (Google, UN, etc.) and whether data was to be shared with government. There was a notable dearth of trust in the government to limit what I would characterize as secondary use or mission creep. 3/

These results are, again, preliminary and the paper is pre-publication. We release in light of how quickly events are unfolding. The center of gravity for the work is @uwcse, with the following authors (plus me): @lucysimko, @franziroesner, and @yoshi_kohno. Thoughts welcome! 4/4