Esther Onfroy Esther's homepage

Purple hacker, mobile security/privacy researcher, malware RE.

About Esther

Expert in information security and reverse engineering, Esther aka U039b is a French hacktivist, lecturer and co-founder of Defensive Lab Agency, Exodus Privacy, PTS project, Pithus, Echap, La Résille. She fights against surveillance capitalism and has contributed to several investigations highlighting the illegal data collection by major digital actors. She helps journalists, academics and NGOs to better understand the issues of cybersecurity and surveillance on mobile devices.

Being social


Publications & Research