الثلاثاء، 2 يوليو 2013

When someone says its "just metadata"...

Some discussions of Snowden's NSA revelations offer reassurance that the information collected is "only metadata," arguing that the data are only used to find patterns and trends and that personal details are not retrievable.

German Green Party politician Malte Spitz has reported in the New York Times his experience in retrieving his own metadata:
In May 2010, I received a brown envelope. In it was a CD with an encrypted file containing six months of my life. Six months of metadata, stored by my cellphone provider, T-Mobile. This list of metadata contained 35,830 records...

The truth is that phone companies have this data on every customer. I got mine because, in 2009, I filed a suit against T-Mobile for the release of all the data on me that had been gathered and stored... All of this data had to be kept so that law enforcement agencies could gain access to it. That meant that the metadata of 80 million Germans was being stored, without any concrete suspicions and without cause...

Together with Zeit Online, the online edition of the weekly German newspaper Die Zeit, I published an infographic of six months of my life for all to see. With these 35,830 pieces of data, you can follow my travels across Germany, you can see when I went to sleep and woke up, a trail further enriched with public information from my social networking sites: six months of my life viewable for everybody to see what exactly is possible with “just metadata.” 

Three weeks ago, when the news broke about the National Security Agency’s collection of metadata in the United States, I knew exactly what it meant. My records revealed the movements of a single individual; now imagine if you had access to millions of similar data sets. You could easily draw maps, tracing communication and movement. You could see which individuals, families or groups were communicating with one another. You could identify any social group and determine its major actors. 

All of this is possible without knowing the specific content of a conversation, just technical information — the sender and recipient, the time and duration of the call and the geolocation data. 
I can't embed the infographic, which is here.

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