Regulating privacy and the way we use (big) data Dennys Antonialli Universidade de São Paulo Abstract From social network analysis, interpreting online behaviors and predictive modeling, the way data have been mined, treated and used has changed significantly. If, on the one hand, the so called phenomenon of "Big Data" has enable important advances and discoveries, on the other hand, it poses significant threats to privacy and transparency. Decision making processes have been relying more and more on the use of algorithms, the majority of which work as "black boxes". Given the inherent analytical assumptions and methodological biases built into many big data systems, a more rigorous regulatory framework seems to be needed. This presentation will discuss some of the challenges policymakers face when trying to balance big data innovation with privacy protection, particularly focusing on the case of Brazil and our attempts to create a privacy baseline legislation ("Brazilian Civil Rights Framework for the Internet and the Draft of the Data Protection Bill). Short Biography PhD candidate in Constitutional Law at the University of São Paulo (Brazil), where he also earned his bachelor of laws degree. He holds a “Master of the Science of Law” degree from Stanford Law School and a “Master of Lawand Business” from Bucerius Law School/WHU Otto Beisheim School of Management in Germany. Dennys has worked in the technology and civil liberties team of the American Civil Liberties Union of Northern California (ACLU/NC) and acted as a legal consultant for the “Timor-Leste Legal Education Project” (Stanford LawSchool/Asia Foundation). He has been awarded the first place prize of the “2011 Steven M. Block Civil Liberties award” for best written work on civil liberties at Stanford Law School and won the first place prize of the “Brazil’s Internet Framework Bill & Development Award” (Google/FGV-SP). In 2013, he was a fellow researcher at the Alexander von Humboldt Institute for Internet and Society (Berlin). In July 2014, Dennys attended the Summer Doctoral Program at the Oxford Internet Institute. Currently, he is the coordinator of the “Law, Internet and Society Nucleus” of the University of São Paulo (NDIS-USP) and the executive director of InternetLab, an independent think tank on internet policy in Brazil.