Once done, they only used the geolocation data of the sample set.
The geolocation data is available when user posts an update on Facebook or tags a photo on Instagram.
From this geolocation data the researchers were easily able to identify the anonymous users.
The objective was to test whether this data could identify users or not.
The same testing was done on credit card transactions information to cell tower pings.
This is a question we now have to answer.
Chaintreau also explained how the tool worked in identifying the anonymous users.
source: www.techworm.net
