Fri. Aug 13, 2021 | Author Unk. | wired |
Carriers know where you are every time your phone reconnects to the cell network
but with Pretty Good Phone Privacy, they wouldn’t have to.
Much of the third-party location data industry is fueled by apps that gain permission to access your GPS information, but the location data that carriers can collect from cell towers has often provided an alternative pipeline. For years it’s seemed like little could be done about this leakage, because cutting off access to this data would likely require the sort of systemic upgrades that carriers are loath to make.
At the Usenix security conference on Thursday, though, network security researchers Paul Schmitt of Princeton University and Barath Raghavan of the University of Southern California are presenting a scheme called Pretty Good Phone Privacy that can mask wireless users’ locations from carriers with a simple software upgrade that any carrier can adopt—no tectonic infrastructure shifts required.
“The primary problem we’re trying to address is bulk data collection and the sale of it,” Raghavan says. “We see it as a user privacy issue that carriers can amass this location data whether or not they are currently actively selling it. And our goal here was backward compatibility. We didn’t want the telecoms to have to roll out anything, because we knew they weren’t going to.”…
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