...
https://arxiv.org/pdf/2003.14412v2.pdf
Short-term plan (MVP1) is outlined in detail here:
Design for MVP1 HA JSON Changes
This rougly aligns with the “interim” hashing solution covered in the MIT paper above, and the Wired aricle referenced below.
Our long-term plan is #4 in this paper:
https://github.com/PrivateKit/PrivacyDocuments/blob/master/GpsEncryption.pdf
8 April Wired article discussing Safe Paths Privacy algorithms.
https://www.wired.com/story/covid-19-contact-tracing-apps-cryptography/