> Cell phones are generating a staggering amount of geo-locational data (600B transactions a day being created in the US)
> This data is being “de-identified” and shared with third parties – in volume and in real-time
> Your movement quickly reveals where you spend your time (e.g., evenings, working hours) and who you spend time with (e.g., friends)
> Re-identification (figuring who is who) is somewhat trivial
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