Ricerc@Sapienza

Every day we publish an impressive amount of information about ourselves online: Pictures, videos, tweets, posts, and check-ins. These (big) data tell the story of our public lives and, at first, are seemingly innocuous. Nonetheless, they reveal a great deal of information about the things that we wished to remain private too. The goal of this work is to demonstrate how an attacker can exploit these data to jeopardize our privacy. In particular, we focus on Happn, a location-based dating app that counts millions of users worldwide.