Paul-Olivier Dehaye is a mathematician at the University of Zurich working on interoperability tools enabling new forms of collaborative work on mathematical data, knowledge and software. In his spare time, he enjoys litigating (and especially winning!) against multibillion dollar businesses for the defence of his fundamental right to data protection. He is now leveraging that experience as co-founder of PersonalData.IO, a service that helps individuals regain control over their personal data.