The NSA does not target Americans’ location data by design, but the agency acquires a substantial amount of information on the whereabouts of domestic cellphones “incidentally,” a legal term that connotes a foreseeable but not deliberate result.
One senior collection manager, speaking on the condition of anonymity but with permission from the NSA, said “we are getting vast volumes” of location data from around the world by tapping into the cables that connect mobile networks globally and that serve U.S. cellphones as well as foreign ones. Additionally, data are often collected from the tens of millions of Americans who travel abroad with their cellphones every year.
In scale, scope and potential impact on privacy, the efforts to collect and analyze location data may be unsurpassed among the NSA surveillance programs that have been disclosed since June. Analysts can find cellphones anywhere in the world, retrace their movements and expose hidden relationships among the people using them.
U.S. officials said the programs that collect and analyze location data are lawful and intended strictly to develop intelligence about foreign targets.
Robert Litt, general counsel for the Office of the Director of National Intelligence, which oversees the NSA, said “there is no element of the intelligence community that under any authority is intentionally collecting bulk cellphone location information about cellphones in the United States.”
The NSA has no reason to suspect that the movements of the overwhelming majority of cellphone users would be relevant to national security. Rather, it collects locations in bulk because its most powerful analytic tools — known collectively as CO-TRAVELER — allow it to look for unknown associates of known intelligence targets by tracking people whose movements intersect.
Still, location data, especially when aggregated over time, are widely regarded among privacy advocates as uniquely sensitive. Sophisticated mathematical techniques enable NSA analysts to map cellphone owners’ relationships by correlating their patterns of movement over time with thousands or millions of other phone users who cross their paths. Cellphones broadcast their locations even when they are not being used to place a call or send a text message. Read Entire Story
Analysis - This is surprising to us not at all. Since the Snowden affair broke we have surmised that location data is at the top of the NSA's priority list. The aggregation part is particularly bad: think about it as you leaving little breadcrumb trails of location data everywhere you go, and the NSA coming along behind you and analysing all of them. They can develop a VERY comprehensive picture of your life.
The consequences of this revelation will be both good and bad: Good in that it will force location data privacy to the forefront of the privacy discussion. Bad in that it will accelerate the development of ways to mask or even "spoof" a person's location, which will make implementing location-based services significantly more complicated.