I am the chief scientist and one of the co-founders of the Data Transparency Lab. I spent 10 years as senior researcher with Telefonica Research in Barcelona. Prior to joining Telefonica I was a postdoc fellow at Harvard University and a Marie Curie postdoc fellow at Boston University. I got my PhD in computer science from the University of Athens in 2004. My interests include: privacy/transparency/data protection, economics of networks, intelligent transportation, distributed systems, protocols, and network measurements.