Researchers at the University of Texas at Austin have taken a close look at the way anonymous data can be analyzed and have come to some troubling conclusions. In a paper [33bits.org] set to be delivered at an upcoming security conference, they showed how they were able to map out the connections on public social networks such as Twitter and Flickr. They were then able to identify people who were on both networks by looking at the many connections surrounding their network of friends. The technique isn’t 100 percent effective, but it may make some users uncomfortable about whether they should allow their data to be shared in an anonymous format.
Source: https://threatpost.com/researchers-can-id-anonymous-twitterers-032609/72461/