I reccommend people read Google's blog post about it and their overview (which is vital to understand it) about how they will achieve this. Important points: This doesn't use GPS at all (but rather bluetooth low energy) Is designed to be privacy preserving Uses anonmyised identifiers that are randomized constantly (using SHA-256 encryption) And the most important part is It is voluntary. I highly encourage that everyone reads Google and Apple's own blog posts and the specifications before you speculate or read anything. https://www.blog.google/inside-google/company-announcements/apple-and-google-partner-covid-19-contact-tracing-technology/ https://www.apple.com/newsroom/2020/04/apple-and-google-partner-on-covid-19-contact-tracing-technology/ I think their privacy preserving by design is a good way to make this and perhaps the only way. Both companies risk a lot by producing a contact tracing platform that doesn't take peoples privacy seriously, both in backlash and number of users using it (which is important). Other companies aren't willing to-do this and use a brute-force GPS approach which, quite rightly, has a lot of people skeptical of the uses of the location data. Keeping it purely bluetooth (bluetooth low energy actually, which is even better as GPS is a large battery drain) and never tied to anyone person is great and I commend the engineers and designers who made this specificiation (without it taking so many years as many specifications do). For once I'm happy with what Google and Apple have done here and hope this gives it the large amount of users it genuinely needs.
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