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iririririryesterday at 10:17 PM1 replyview on HN

not because you knew how much someone worked out. But because it had GPS.


Replies

fc417fc802today at 3:17 AM

True.

But keep in mind that other less obvious data sources can often lead to similar issues. For example phone accelerometer data can be used to precisely locate someone driving in a car in a city by comparing it with a street map.

In the context of the military even just inferring a comprehensive map of which people are on which shift and when they change might be considered a threat.