http://magma.ua4vjlx72wv5crhkificaeysp62hizhazipfshsdvs6jxqvhtkpllcad.onion/guide/network-measurements.html
Locations of mobile
phones can also be collected when the GPS is switched off, by triangulating the
position with regards to Wi-Fi access points or cell towers. When a mobile phone
moves, it is usually in the direct possession of a person (typically its owner).
GPS or triangulated locations can therefore reveal the location of a specific
person at a certain time and, more importantly, the series of...