About me

I am a senior Ph.D. student in computational privacy at the Massachusetts Institute of Technology Media Lab under the supervision of Prof. Alex "Sandy" Pentland. My research aims at understanding how the unicity of human behavior impacts the privacy of individuals in large-scale metadata datasets. (150-words bio)

My work has been covered in BBC News, CNN, The New York Times, Wall Street Journal, Foreign Policy, Le Monde, Die Spiegel, and in reports of the World Economic Forum, United Nations, and the European Commission, as well as in my talks at TEDxLLN and TEDxULg. I recently wrote op-ed on metadata for the Christian Science Monitor and Le Monde. I worked for the Boston Consulting Group and acted as an expert for the Bill and Melinda Gates Foundation and the United Nations. I am a fellow of the ID³ Foundation, the B.A.E.F. Foundation, and a research associate at Data-Pop. I am organizing NetMob, the International Conference on the Analysis of Mobile Phone Datasets, and I am serving on numerous program committee.

I approach the privacy of metadata; mobile phone, credit cards, or browsing metadata; from two angles. First, I developed the concept of unicity to study the risks of re-identification of large-scale metadata datasets. We showed that in 4 spatio-temporal points are enough to uniquely identify 95% of people in a mobility database of 1.5M people. We furthermore showed that even coarse or blurred datasets provide little anonymity. Second, I use machine learning techniques to study what can be inferred from metadata about individuals. For example, using behavioral indicators computed from metadata using the Bandicoot toolbox, we were able to predict people's personality up to 1.7x better than random. Ultimately, I am however convinced of the amazing potential of this data for good, allowing us to better understand human behavior and their societies at scale. My research goal is to help make metadata more available but in a privacy-conscientious way through online systems such as openPDS/SafeAnwers or conscientious anonymization such as in the D4D Challenge with Orange.

I was a visiting researcher during 6 months at the Santa Fe Institute under the supervision of Nathan Eagle as well as a researcher Université catholique de Louvain under the supervision of Profs. Vincent D. Blondel. Within 6 years, I obtained M.Sc.s from the Université catholique de Louvain in Applied Mathematics, from Ecole Centrale Paris (Centralien) in Engineering and Industrial Management as part of the T.I.M.E. program, and from Katholieke Universiteit Leuven in Mathematical Engineering as well as my bachelor in general engineering at the Université catholique de Louvain.