NRK (The Norwegian public broadcaster) recently purchased publicly available data from a British Company about 140,000 cell phone users in Norway for 35 000 kr (about $3,500). This includes detailed locations of all users at any given time over the course of several months. The 140,000 users also included military personnel at Rena Leir, possibly the most significant military base in Norway as it is the home of FSK (Forsvarets Spesialkommando).
The data on all users was gathered through various apps installed on their device, and which tracked their locations, often without their actual knowledge or explicit approval.
The data allowed NRK to show where users had spent the night on base, and thus, deduct sexual and personal relationships, which, in the worst case scenario could be used by an enemy for blackmailing, and in the best case scenario are now public (most probably don’t want who they dick to be part of the public record, as it is one of the most fundamental aspects of privacy). The data also showed what secure area users had visited, as well as when they were on and off duty.
Worst, data was also provided about 7,500 mobiles within nasjonalt definerte forbudssoner (national prohibition zones), which are places with extra protection against surveillance, mapping and other data collection for the national security of Norway. This included the precise whereabouts of officers previously deployed in war zones.
No FSK operative (whose identity is kept secret under Norwegian law) was compromised in this release of data, due to compliance with very stringent security policies.
See NRK report: https://www.nrk.no/norge/xl/norske-offiserer-og-soldater-avslort-av-mobilen-1.14890424