It can reveal details about the number of users in a location, user and supply movements, daily routines , and can expose otherwise unknown associations between users and locations.
The New York Times also published this sobering feature outlining services that use mobile location data to track the histories of millions of people over extended periods.
Patrick Wardle, a macOS and iOS security expert and a former hacker for the NSA, said the recommendations are a great start but that people who follow the recommendations shouldnt consider them anything close to absolute protection.
It, as always, is a tradeoff between functionality/usability and security, but basically if you use a phone, assume that you can be tracked.
Tuesdays advisory also recommends people limit sharing location information in social media and remote metadata showing sensitive locations before posting pictures. The NSA also warns about location data being leaked by car navigation systems, wearable devices such as fitness devices, and Internet-of-things devices.
The advice is aimed primarily at military personnel and contractors whose location data may compromise operations or put them at personal risk.
Original article